Doran Satanove is a litigation associate in the New York office of Gibson Dunn. He is a member of the firm’s Trade Secrets, Intellectual Property, Media, Entertainment and Technology, and Labor and Employment Practice Groups.

His practice is focused on trade secrets and copyright matters for media, entertainment, and technology companies, in addition to general breach of contract and restrictive covenant matters. He has litigated numerous high-stakes cases in these areas in federal and state courts from coast to coast, and at all phases of litigation. Doran has significant experience drafting and arguing dispositive and discovery motions, first- and second-chairing depositions, and leading offensive and defensive written and document discovery efforts. He also has led forensic investigations into trade secret-related matters. Doran also regularly counsels clients on trade secrets, false advertising, and trademark issues in the digital advertising, technology, and life sciences spaces.

Doran has been recognized in Best Lawyers: Ones to Watch® in America for Entertainment and Sports Law (2024-2026).

Representative Trials and Arbitrations:

  • Member of team that obtained a complete victory for AMC Networks following a two-week bench trial in 2020 and a sweeping summary judgment win in 2022, defeating multi-hundred-million-dollar claims. Represented AMC in related profit participation and breach of contract litigations in New York.
  • Member of team securing a victory in a multi-million-dollar confidential profit participation accounting arbitration following a one-week hearing, in which he took a witness.
  • Member of team securing a victory in a multi-million-dollar confidential arbitration concerning a fraud and profit participation dispute, following a two-week hearing, in which he took a witness.

Representative Intellectual Property and Entertainment Matters:

  • Securing summary judgment on willfulness damages in three copyright infringement lawsuits, on behalf of Apple, Inc., concerning alleged infringement on the iTunes store, resulting in plaintiffs voluntarily dismissing all three cases with prejudice.
  • Securing favorable settlement for MGM-subsidiary Big Fish Entertainment in a copyright and trademark infringement lawsuit concerning the television series Live PD;
  • Securing favorable settlement on the eve of trial for Yahoo affiliate in a copyright infringement action concerning the public display right.
  • Securing motion to dismiss and ultimately a favorable settlement for Guardant Health, a precision oncology company in a high-stakes patent inventorship, trade secret, and contract dispute.
  • Securing dismissal with prejudice of a trade secrets dispute brought against Oath Holdings, Inc., a subsidiary of the Verizon Media Group.
  • Securing a temporary restraining order and preliminary injunction on behalf of a technology start-up asserting breach of restrictive covenants and trade secret claims against a former employee.
  • Securing favorable settlement for Blackstone Group affiliate in a trade secrets misappropriation and breach of contract and fiduciary duty litigation against its former general counsel.
  • Securing favorable settlement for Archer Aviation in a closely watched, high-stakes trade secrets case, in which Gibson Dunn previously secured the denial of a preliminary injunction against Archer.
  • Securing dismissal of trade secret and hacking-related claims against an international strategic consultancy firm.
  • Securing a motion to compel arbitration in a trade secrets suit filed against a clinical stage gene therapy company.
  • Representing HSBC and employees in a trade secrets and breach of contract action brought by First Citizens Bank, relating to the collapse of Silicon Valley Bank. Achieved a favorable ruling on a motion to dismiss significantly cutting down the claims and defendants at issue in the case.
  • Representing Fortune 500 company in a confidential arbitration concerning alleged trade secret theft.
  • Representing entertainment company in confidential profit participation dispute.

Representative General Commercial Matters:

  • Achieving a favorable settlement for Modern Health in the leadup to trial in a founders’ dispute litigation, involving claims of wrongful termination, retaliation, breach of contract, defamation, and tortious interference.
  • Securing a favorable settlement on behalf of a digital advertising and technology company, asserting breach of loyalty and contractual interference claims against a former employee and its competing business.
  • Securing a closure without conditions of a non-public FTC investigation related to a top social networking company’s use of consumer information.
  • Securing favorable class action settlement for a telecommunications company in a lawsuit asserting claims under the Telephone Consumer Protection Act.

Doran also maintains an active pro bono practice. He argued and secured a reversal from the Appellate Division of New York (First Department), in Stevens v. New York State Division of Criminal Justice Services. He has also drafted amicus curiae briefs on immigration law matters before the United States Supreme Court, and helped secure a favorable settlement on behalf of a non-profit dedicated to protecting the rights of the migrant farmworker community, in a First Amendment lawsuit against the federal government.

From 2018 to 2019, Doran served as a law clerk to the Honorable Ronnie Abrams of the United States District Court for the Southern District of New York.

He received his Juris Doctor, magna cum laude, from New York University School of Law 2017, and was elected to the Order of the Coif. During his final year of law school, he served as an extern to the Honorable Dennis Jacobs of the United States Court of Appeals for the Second Circuit. Doran earned his Bachelor of Science degree in Pharmacology, with First Class Honours, from McGill University.

Publications:

Co-Author, COVID-19 News Defamation Claims Are Unlikely To Succeed, Law360 (May 4, 2020)

Author, The Challenging Economics of the Companion Diagnostics Industry: A Compelling Case for Invigorated Patent Protection, 6 N.Y.U. J. Intell. Prop. & Ent. L. 142 (2016)

Jonathan Phillips is a partner in the Washington, D.C. office of Gibson, Dunn & Crutcher, where he is a member of the firm’s litigation department and Co-Chair of the FDA and Health Care Practice Group and False Claims Act/Qui Tam Defense Practice Group. A former DOJ Trial Attorney, his practice focuses on FDA and health care enforcement, compliance, and litigation, as well as other white collar enforcement matters and related litigation. Mr. Phillips is ranked nationally as a leading False Claims Act practitioner by Chambers USA.

Mr. Phillips has substantial experience representing health care, pharmaceutical, and medical device clients in civil and criminal enforcement actions by the Department of Justice, Food and Drug Administration, Department of Health and Human Services Office of Inspector General, State Attorneys General, and other federal and state agencies, as well as related whistleblower litigation. He has particular experience representing clients in health care enforcement matters brought under the False Claims Act, the Anti-Kickback Statute, the Stark Law, and the Federal Food, Drug, and Cosmetic Act, and their state analogues on a wide variety of theories. He also regularly counsels clients on health care fraud and abuse compliance matters and conducts related internal investigations and risk assessments, including counseling Boards of Directors on health care compliance oversight matters and related government and shareholder litigation. Mr. Phillips also has extensive experience defending government contractors and their affiliates in government investigations under the False Claims Act and related breach-of-contract theories, and in related government and whistleblower litigation. Mr. Phillips has been recognized by The Best Lawyers in America® for his work in Health Care (2023–2026) and Qui Tam Law (2025–2026), named by Washingtonian Magazine as a “Top Lawyer” for Criminal Defense-White Collar (2022), and recommended by The Legal 500 for Government Contracts (2024–2025).

Prior to joining Gibson, Dunn & Crutcher, Mr. Phillips served as a Trial Attorney in the Civil Division, Fraud Section of the U.S. Department of Justice, where he investigated and prosecuted allegations of fraud against the United States under the False Claims Act and related statutes. His work at DOJ included handling a variety of health care enforcement cases including allegations of pharmaceutical and device fraud, such as off-label promotion, adulterated products, and Anti-Kickback Statute violations, as well as a variety of other types of alleged Medicare and Medicaid provider fraud. Mr. Phillips also investigated and tried cases involving bid rigging and other allegations of fraud by government contractors while at the DOJ.

Representative Matters – Health Care Enforcement, Investigations and Litigation

  • Defended one of the country’s largest hospital and health care services providers in nationwide parallel criminal and civil investigation by DOJ and HHS OIG of medical necessity and quality-of-care allegations, resulting in closure of criminal case with no charges and successful multi-qui tam civil settlement.
  • Successfully defended leading national pharmacy operator in parallel False Claims Act suits brought by DOJ and several states’ Attorneys General, resulting in dismissal on the pleadings of one complaint based on company’s challenge to the viability of the at-issue Medicaid payment rule, and favorable settlement of companion case.
  • Defended biotechnology provider of molecular genetic testing products in parallel DOJ criminal and civil investigation of allegations of upcoding and under the Anti-Kickback Statute and beneficiary inducement prohibitions, resulting in a Non-Prosecution Agreement and favorable civil settlement. Representing the company in related Corporate Integrity Agreement implementation and compliance work.
  • Representing major global biopharmaceutical company in DOJ investigation under the Anti-Kickback Statute and False Claims Act regarding speaker programs for specialty drug products.
  • Representing special litigation committee of the board of a leading pharmaceutical wholesaler and service provider in litigation of shareholder derivative Caremark claims regarding board oversight of company compliance program.
  • Representing national diagnostic laboratory in investigation by the California Attorney General regarding state consumer protection theories in connection with marketing to physicians and patients.
  • Conducted internal investigation for special committee of the board of a leading academic medical center of surgical quality-of-care and quality oversight issues, resulting in detailed report of recommendations for improvement of governance and quality monitoring areas.
  • Represented pharmaceutical manufacturer in parallel criminal and civil DOJ investigation of alleged antitrust violations related to drug prices, resulting in Deferred Prosecution Agreement, favorable civil False Claims Act settlement, and no Corporate Integrity Agreement required by HHS OIG. Named a “Matter of the Year” by Global Competition Review.
  • Defended large hospital system in nationwide DOJ investigation under the False Claims Act of allegations involving medical necessity of interventional cardiology procedures and quality system oversight, resulting in DOJ declination and dismissal of the underlying qui tam.
  • Representing global pharmaceuticals manufacturer in False Claims Act and Anti-Kickback Statute investigation of allegations regarding arrangements with specialty pharmacies and patient support programs.
  • Represented large, nationwide pharmacy chain in False Claims Act investigation of the company’s reporting of “usual and customary” drug prices, resulting in successful settlement.
  • Defended manufacturer of medical and scientific research equipment in qui tam litigation involving alleged violations of federal regulatory restrictions on radiation emissions, resulting in a complete victory including summary judgment for the defendant and affirmance of the judgment in the Ninth Circuit.

Representative Enforcement and Litigation Matters – Defense, Technology, and Other Government Procurement

  • Successfully defended a leading engineering and construction company in False Claims Act suit brought by DOJ alleging cost accounting noncompliance under large nuclear site contract, resulting in a complete dismissal of the complaint after a trial of underlying contract interpretation issues.
  • Defended semiconductor manufacturer in False Claims Act investigation of alleged violations of International Trafficking in Arms Regulations (ITAR), including obtaining DOJ declination, dismissal of the relator’s complaint on the pleadings, and affirmance of the dismissal in the Ninth Circuit.
  • Defended subsidiary of one of the nation’s largest energy providers in False Claims Act investigation of alleged Truth in Negotiations Act (TINA) violations related to contracting for emergency power restoration services, resulting in favorable settlement of FCA claims and government payment of withheld contract funds.
  • Defended engineering and R&D firm in parallel criminal and civil DOJ investigation of alleged timecard fraud that resulted in DOJ declination of both the criminal and civil cases, and a successful motion to dismiss the underlying qui tam.
  • Defended government contractor providing logistics and network management services to the military in DOJ investigation of alleged fraudulent bills for goods and services not provided, resulting in DOJ declination and dismissal of the underlying qui tam.
  • Defended global aerospace engineering firm in False Claims Act investigation involving alleged nonconformity to client and military service specifications, resulting in DOJ declination and dismissal of the underlying qui tam.

Speaking Engagements and Academic Work

  • Adjunct Professor, Columbus School of Law, Catholic University of America – Health Care Compliance Seminar, Fall 2020 to Present
  • “Causation Conundrums in FCA Cases,” Federal Bar Association Qui Tam Section Roundtable (scheduled March 2023)
  • “Evolution of Cyber and DOJ’s Civil Cyber Fraud Initiative,” Government Investigations, Compliance, and Litigation Institute Annual Meeting (Nov. 2022)
  • “Navigating New Terrain with FCA and Qui Tams,” GICLI Annual Meeting (Nov. 2021)
  • “Preparing for Enhanced Antitrust Enforcement in Government Procurement,” Gibson Dunn Webcast, Dec. 2019)
  • “Top Legal Threats and Trends Facing FDA-Regulated Companies,” Food and Drug Law Institute’s annual Enforcement, Litigation, and Compliance Conference (Dec. 2019)
  • “False Claims Act Enforcement, Policy Updates, and Trends in Patient Support,” Food and Drug Law Institute’s annual Enforcement, Litigation, and Compliance Conference (Dec. 2018)
  • “Building Safeguards into Patient Assistance and Support Programs in order to Mitigate Risk,” American Conference Institute’s 18thAnnual Forum on Fraud and Abuse (March 2018)
  • “False Claims Act Litigation in a Post-Yates World: Has the Government Changed Its Approach and Should You?” American Bar Association Litigation Section Annual Conference (May 2017)
  • “Developments in False Claims Act Enforcement,” Food and Drug Law Institute webinar (April 2017)
  • “Going on the Offensive: Strategies for Investigating, Combating, and Affirmatively Litigating Against Fraud,” HCCA Managed Care Compliance Conference (Jan. 2017)
  • “False Claims Act Enforcement Targeting Drug and Device Companies,” Food and Drug Law Institute’s annual Enforcement, Litigation and Compliance Conference, Washington, D.C. (Dec. 2016)
  • “Litigating Against the Government,” moderated panel sponsored by the Bar Association of D.C. (Nov. 2016)
  • “Hot Topics in Fraud and Abuse Enforcement Involving Health Care Providers,” Gibson Dunn Webcast (Sept. 2016)
  • “How DOJ Can Build a Successful Case Against You: Understanding the Anatomy of a Government Investigation of False Claims,” American Conference Institute’s Advanced Forum on False Claims and Qui Tam Enforcement, New York, NY (January 2014)

Sample Publications

  • Gibson Dunn’s False Claims Act Year-End and Mid-Year Updates, (co-author) 2013-2023
  • “Anti-Kickback Circuit Split Holds Implications for Defendants” (co-author) (Law360, August 2022)
  • “Senators’ Call for Increased DOJ Use of Suspension and Debarment Could Impact False Claims Act Investigations and Resolutions (co-author) (Client Alert, August 2022)
  • “Prescription Drug Sampling Regulation and Enforcement” chapter in Practicing Litigation Institute’s Pharmaceutical Compliance and Enforcement Answer Book (co-author) (2021)
  • “Using and Defending Against Statistical Sampling in False Claims Act Cases” (co-author) (AHLA Connections, January 2017)
  • “FCA Liability After Escobar: Challenges and Opportunities for Device Companies” (co-author) (MedTech Insight, October 2016)
  • “Compliance Perspectives on the Developing Contours of the Patient Safety and Quality Improvement Act” (co-author) (HCCA Compliance Today, October 2016)
  • “Compliance Implications of the Rise of False Claims Act Cases Based on the 60-Day Rule” (Westlaw Journal Health Care Fraud, November 2015)

Previously, Mr. Phillips was an associate at a law firm in Washington, D.C., and served as a law clerk for Judge J. Curtis Joyner of the U.S. District Court for the Eastern District of Pennsylvania.

Mr. Phillips received his law and undergraduate degrees from the University of Pennsylvania. He is a member of the bars of the State of Maryland and the District of Columbia.

James P. Fogelman is a partner in the Century City and Los Angeles offices of Gibson Dunn. He is a member of the firm’s Litigation and Real Estate Departments. James is the Chair of the Firm’s Real Estate Disputes Practice Group. James regularly advises the Firm’s real estate clients with respect to real estate transactions and real estate disputes throughout the United States, and beyond.  James provides advice to clients across the real estate ecosystem, from lenders to borrowers, from buyers to sellers, from landlords to tenants, and from operators to investors.  While the goal in the real estate disputes practice is to avoid litigation when possible, as an experienced trial and appellate lawyer, James can assist clients with virtually any type of dispute from commencement through conclusion.  A few recent examples of real estate litigation matters include:

  • Just completed trial in a complex construction defect and lease dispute in a JAMS arbitration in Washington, D.C.
  • Just completed trial in an action seeking specific performance and reformation based on fraud in connection with a large commercial real estate acquisition, in Chancery Court in Nashville, Tennessee.
  • Just completed trial in a multi-million-dollar commercial lease dispute in Los Angeles, California.
  • Successfully tried a challenge to the removal of the operating member of a joint venture in a JAMS arbitration in New York.
  • Successfully obtained a dismissal of an action in federal court in New York in which a non-traditional lender sought to enforce a Guaranty in a manner not permitted by the Guaranty.
  • Successfully defended a lender in a mechanics lien foreclosure action in Los Angeles while guiding the lender through a completed non-judicial foreclosure.
  • Successfully obtained dismissal of a lawsuit in Los Angeles against a buyer, brought by a former owner, seeking to enforce an “anti-flip” provision in a prior deed.
  • Successfully tried a case in Los Angeles over the removal of the operator of a joint venture and control over almost $500 million in multi-family real estate; obtained dismissal of related $12 billion claim.

James is also a member of the Firm’s Sports Law and Betting and Gaming Practice Groups, and has decades of experience advising, litigating and trying cases for sports, fantasy sports, casinos and gaming companies throughout the United States.  James was recognized by Law360 as a Sports MVP for 2017.  James is also a former Co-Chair of the Firm’s Law Firm Defense Practice Group, and has represented major law firms in trial and appellate courts, and in arbitration, for over 30 years.  Most recently, James was included in the 2025 and 2026 editions of the The Best Lawyers in America for his work in Commercial Litigation. James is a member of the bars of the State of California, the State of Nevada, the State of New York, and the District of Columbia.  James is also a member of the Firm’s Office of General Counsel, a member of the Firm’s Ethics Committee and a member of the Firm’s Lateral Partner Committee.  James earned his law degree in 1992 from the UCLA School of Law.  He received a Bachelor of Science degree in Economics, with a concentration in Finance, from the Wharton School of Economics at the University of Pennsylvania in 1989.  

Liz Ryan is a partner in Gibson Dunn’s Dallas office. As a nationally recognized first-chair trial lawyer, Liz represents clients in complex, high-stakes disputes. Her trial experience includes antitrust, business disputes, intellectual property, personal injury, and products liability cases. She has a winning record, counseling clients and navigating them through disputes in federal courts, state courts, and arbitrations, including multi-district litigations, class actions, and mass actions. Her experience spans industries, including consumer products, energy, financial services, life sciences, and technology.

Representative Experience*

  • Payment card services corporation in an antitrust suit commenced by a competitor generally alleging that certain fees and agreements constitute an integrated scheme that violates antitrust laws.
  • Major technology company as trial counsel in a high-stakes antitrust action in which the FTC sought to enjoin its planned acquisition of a virtual reality application developer.
  • Leading American supermarket chain in the first bellwether jury trial against pharmacies in In re Opiate Litigation, in which two Ohio counties sought $3 billion in damages from the pharmacies. At the close of the plaintiff’s case, the client successfully settled for a confidential amount.
  • Leading broadband communications company as trial counsel in a False Claims Act case, which settled favorably on the eve of trial.
  • Pioneering video game developer, in a breach of contract and theft of trade secrets case, through which the client sought more than $40 million in damages and also faced hundreds of millions of dollars in counterclaim damages. The case settled for a confidential amount.
  • Major pharmaceutical company in the multi-district litigation In re National Prescription Opiate Litigation and in a lawsuit brought by the State of Oklahoma.
  • Leading technology companies in a multi-billion-dollar theft of trade secrets and copyright lawsuit.
  • Financial services company in an internet defamation case and obtained a record-setting $12.5 million dollar verdict.
  • National private lender in a breach of contract case and obtained a judgment of more than $7 million dollars.
  • Financial services division of an industrial conglomerate in a fraudulent transfer case and obtained a jury award of more than $3.3 million dollars.
  • Leading international technology company in a breach of contract case and obtained a favorable settlement following arbitration.
  • National real estate company in a breach of contract case and obtained the client’s full measure of damages and attorneys’ fees in trial.
  • Numerous companies, including leading technology companies, in breach of non-solicitation and non-compete cases and obtained restraining orders and injunctions, as well as favorable settlements for clients.

Liz has been recognized for her work by leading national business and legal publications. In 2023 , 2024, and 2025, Chambers USA ranked Liz among the top lawyers for General Commercial Litigation in Texas, with clients calling her “outstanding,” “very smart and extraordinarily professional,” “thorough and well prepared,” and “a very skilled trial lawyer.” Recently, Benchmark Litigation named her one of the “Top 250 Women in Litigation,” and she was also recognized by Benchmark Litigation as a “Litigation Star.” From 2023 to 2026, The Best Lawyers in America named Liz a “Best Lawyer” for Commercial Litigation. In 2022, Texas Lawyer named her among the 27 Texas attorneys “On the Rise,” which honors the top attorneys under 40. Benchmark Litigation included Liz on its “40 & Under List” from 2017 to 2023, and Texas Super Lawyers heralded Liz as a “Rising Star” in business litigation from 2014 to 2017. In both 2018 and 2019, the National Diversity Council recognized Liz as one of the top female attorneys in Texas.

Liz is actively involved in several legal and community organizations. She currently serves on the Board of Directors of the Perot Museum of Nature and Science. She is a member of the International Association of Defense Counsel, an invitation-only, peer-reviewed organization whose members are distinguished law firm partners, in-house counsel, and insurance executives. Liz is also a Barrister in the Barbara M.G. Lynn Inn of Court and was an inaugural member of the Dallas Bar Association’s WE LEAD program. She also serves on the Women of Tocqueville’s Steering Committee for the United Way of Metropolitan Dallas.

Prior to joining Gibson Dunn, Liz was a partner in the Dallas office of a major law firm. Before that, she was a partner at a boutique commercial litigation firm based in Dallas. 

Liz received her J.D. from William and Mary School of Law, where she was admitted to the Order of the Barristers. She received her B.A., summa cum laude and Phi Beta Kappa, from Syracuse University.  After law school, she clerked for the Honorable Eugene E. Siler, Jr. of the U.S. Court of Appeals for the Sixth Circuit.

*Matters handled prior to Gibson Dunn.

Casey J. McCracken is a partner in the Orange County office of Gibson, Dunn & Crutcher LLP and a member of the Litigation,  Intellectual Property, and Artificial Intelligence practice groups. His practice focuses on complex commercial litigation, with a focus on technology litigation, including patent litigation, software copyright, trade secret, artificial intelligence, unfair competition, contract disputes, and licensing. Casey also defends law firms in legal malpractice cases, including those involving underlying intellectual property matters.

Casey has successfully represented clients in numerous high-stakes intellectual property and technology cases and several trials, including “bet the company” cases and numerous cases alleging damages over $1 billion. His work spans a variety of technologies, including cellular network technology, software, digital devices, smartphones, medical devices, and mechanical apparatuses. Casey also has substantial experience litigating business contract and tort claims, including breach of contract, false advertising, unfair competition, and interference. He has also represented technology companies and their directors in class actions, including, data privacy, employment discrimination and breach of fiduciary duty cases. Casey’s clients range from Fortune 500 (and Fortune 10) companies to growing start-ups.

Recent representative matters include:

  • Lead member of the trial team that successfully represented a leading enterprise resource planning software support company in a case alleging over $1 billion in damages; defense caused the opponent to drop all damages claims on the eve of trial.
  • Second-chaired trial for a leading enterprise resource planning software support company in an action to enforce an injunction.
  • Key member of trial team defending VMware and Dell EMC against plaintiff WSOU’s $435 million claim of infringement of three patents related to cloud computing. On third day of jury trial, won first ever directed verdict of non-infringement before Judge Albright in the Western District of Texas, leading to a complete defense victory.
  • Key member of the trial team that successfully defended Hewlett Packard Enterprises in a software copyright trial, obtaining a jury verdict for a fraction of the damages sought.
  • Argued and won an appeal for a major accounting and consulting firm, obtaining full recovery of over $1 million in e-discovery costs—the largest award recorded in any California decision.
  • Member of the trial team that won a complete defense verdict for T-Mobile in patent infringement case involving cellular networking technology.
  • Defended a major accounting and consulting firm in an action for breach of contract involving a software contract, obtaining a complete dismissal with prejudice of a multi-hundred-million-dollar claim, and exposing a massive fraud committed by the Plaintiff and its counsel.
  • Successfully represented an AmLaw 50 law firm in arbitration alleging over $300 million in damages for alleged malpractice relating to a complex transaction.
  • Represented a video game company in connection with a gender discrimination class action with a focus on pay equity claims and defenses.
  • Secured dismissal, on behalf of a mid-size technology company, of Digital Millennium Copyright Act, computer hacking, and competition claims brought by a Broadcom subsidiary.
  • Successfully represented a major AmLaw 100 law firm in complex litigation involving an alleged Ponzi scheme.
  • Successfully represented the San Diego Padres in a class action alleging breach of the covenant of good faith and fair dealing with respect to certain fans.
  • Successfully represented the Los Angeles Rams in multiple matters related to stadium seat licenses.

Casey has been repeatedly named as a “Rising Star” by Super Lawyers magazine. Casey has also been recognized by The Best Lawyers in America® in the area of Commercial Litigation. He has practiced in federal courts throughout the country, California state court, and federal and state appellate courts.

Prior to joining Gibson Dunn, Casey served as a judicial clerk for United States District Judge Ricardo S. Martinez in the Western District of Washington. He graduated Order of the Coif from Stanford Law School. He holds a Bachelor of Science degree in mathematics with distinction and a Bachelor of Arts degree in economics with honors and distinction, both from Stanford University.

Gregory J. Kerwin is a litigation partner in Gibson Dunn’s Denver office, experienced in handling major trials and appeals. He served as Partner in Charge of the Gibson Dunn Denver office from 1998 to 2003. He has been ranked in Chambers USA: America’s Leading Lawyers for Business as a leading litigation lawyer every year since 2007. Additionally, Greg was selected by his peers as “Lawyer of the Year” in the 2026 edition of Best Lawyers in the area of Bet-the-Company Litigation and has been recognized since 2013 for his work in Appellate, Commercial, and Securities Litigation practices.

Greg handles complex securities, antitrust, and business tort and contract disputes. He has served as lead or second-chair in approximately 20 jury trials, bench trials, and arbitrations, and has argued and briefed many cases in the Colorado appellate courts, Tenth Circuit and Ninth Circuit. Besides extensive work in state and federal court in Colorado, Greg has represented clients in trial courts in 17 other states: Alabama, Alaska, Arizona, California, Idaho, Kentucky, Minnesota, Nevada, New Mexico, New York, Oklahoma, Tennessee, Texas, Utah, Virginia, Washington, and Wyoming.

Through his litigation work, Greg has become familiar with diverse industries including: oil and gas exploration, production, and pipelines; coal, rare earth, and gold mining; telecommunications; satellite television; avionics; investment banking; accounting; financial services; commercial lending; insurance; computer software and hardware; car rental; wholesale food distribution; restaurants; trucking and truck stops; medicine; emergency medical services; and health care.

Greg graduated magna cum laude from the Duke University School of Law in 1984. He served as Editor-in-Chief of the Duke Law Journal from 1983 to 1984, and worked as a law clerk for Judge James K. Logan of the U.S. Court of Appeals for the Tenth Circuit from 1984 to 1985. Greg received his bachelor’s degree in history from Colorado College, where he graduated magna cum laude in 1981.

Greg wrote chapters on appellate standards of review and preparing certiorari petitions in A. Gill, Colorado Appellate Law and Practice (West 2d ed. 2016). He co-chaired seminars on Colorado appellate practice in 1997 and 1999 and was a speaker or moderator on Colorado appellate practice at programs in 2001, 2003, 2005, 2008, 2011, 2013, and 2014. He and a Gibson Dunn colleague co-authored the chapter on Tenth Circuit practice for the  American Bar Association Council of Appellate Lawyers’ Appellate Practice Compendium: Insiders Guide to State and Federal Appellate Courts (2012). He currently serves as counselor of the Tenth Circuit Historical Society, with past service as chairman, president, vice president, and board member. He has helped organize many history programs for the Historical Society. From 2014-2020, he served as a member of the Board of Advisors for IAALS, the Institute for the Advancement of the American Legal System.

Ronald Mueller is a partner in Gibson Dunn’s Washington, D.C. office and a founding member of the firm’s Securities Regulation and Corporate Governance Practice Group. He advises public companies on a broad range of SEC disclosure and regulatory matters, executive and equity-based compensation issues, and corporate governance compliance and practices. He advises some of the largest U.S. public companies on SEC reporting, proxy disclosures and proxy contests, shareholder engagement and shareholder proposals, insider trading policies and practices, and Section 16 reporting and compliance. He also advises on a variety of sustainability, human capital, and social policy practices and disclosures, including governing documents for companies, boards, and board committees, director independence and related party transaction issues, board oversight of enterprise risks, environmental reporting and engagement, and corporate social responsibility practices and disclosures.

Awards and Accolades:

  • Chambers USA Band 1, “Securities: Regulation: Advisory” (2016 – 2025)
  • Chambers USA Band 1, “Corporate Governance” (2025)
  • Best Lawyers, “Lawyer of the Year: Corporate Governance Law, Washington, D.C.” (2020, 2024, 2026)
  • The Best Lawyers in America, “Corporate Compliance Law”, “Corporate Governance Law”, “Securities Regulation” (2006 – 2026)
  • Who’s Who Legal, “M&A and Governance” (2023 – 2024)
  • Euromoney, “Best of the Best United States Guide” (2020 – 2022)
  • Expert Guides, “Banking, Finance and Transactional Guide” (2022)
  • Best Lawyers, “Lawyer of the Year: Corporate Governance Law, Washington, D.C.” (2020)

Ronald is active with the Committee on Federal Regulation of Securities within the American Bar Association’s (ABA) Section of Business Law and is a fellow of the American College of Governance Counsel. He is a frequent speaker and author on securities and corporate governance matters, including developments in proxy disclosures and proxy contests, the SEC’s disclosure requirements, corporate governance developments, Section 16 rules, and executive compensation issues.

From 1989 to 1991, Ronald worked as legal counsel to Commissioner Edward H. Fleischman at the United States Securities & Exchange Commission (SEC). While at the SEC, he worked on many of the matters before the Commission, including executive compensation rules, enforcement matters and regulatory initiatives. Ronald received his J.D., from Columbia Law School, where he was both a Harlan Fisk Stone Scholar and a James Kent Scholar, and his B.A., magna cum laude, from Vanderbilt University.

Sanford W. Stark is a partner in the Washington D.C. office of Gibson Dunn and the global Chair of the firm’s Tax Controversy and Litigation Practice Group.

Sanford counsels on a wide range of complex domestic and international tax issues, including a significant emphasis on transfer pricing. He has served as counsel in a number of the largest tax controversy and litigation matters in recent years. He advises clients in various industries and on all aspects of the tax controversy process, including pre-audit, audit, administrative appeals, Advance Pricing Agreements, and Competent Authority proceedings. Sanford litigates tax disputes in federal trial and appellate courts and State courts, and his transfer pricing experience includes planning and internal restructurings in addition to controversy and litigation.

Sanford is consistently named one of the nation’s leading Tax Controversy lawyers as recognized in Chambers USA (both Nationwide Tax Controversy and District of Columbia Tax), The Best Lawyers in America, the World Tax Experts Guide, the Tax Controversy Leaders Guide, ITR World Tax (Highly Regarded in both Tax Controversy and World Transfer Pricing), Who’s Who Legal (recognized as a Thought Leader), and the Guide to World’s Leading Transfer Pricing Advisers, among other publications. Clients describe him as “a brilliant tax attorney,” “exceptionally skilled,” “amazing to work with,” “extremely knowledgeable, responsive and engaging,” and a “great practitioner whom peers and clients all trust and respect.” He “receives resounding acclaim for his work on large tax controversy matters,” is a “great team leader with a great courtroom presence,” and clients find that he possesses “strong business and legal insights,” and “takes the time to understand us and you really feel he is part of your team. He always does what is right for the client.”

Most of Sanford’s representations, including some of his largest, involve matters that are not publicly disclosed. Representative disclosed matters include:*

  • Rover Pipeline LLC v. Commissioner, Ohio Supreme Court, Docket No. 2024-0484 (property tax on pipeline)
  • In re Grand Jury, U.S. Supreme Court, Docket No. 21-1397 (amicus curiae for Silicon Valley Tax Directors Group)
  • Western Digital Corporation & Subsidiaries v. Commissioner, T.C. Docket Nos. 18984-18 and 4818-19 (transfer pricing and section 956) (settled shortly before trial)
  • Amazon.com, Inc. & Subsidiaries v. Commissioner, 148 T.C. 108 (2017) (transfer pricing (cost-sharing) issues; >5-week trial), aff’d 934 F.3d 976 (9th Cir. 2019)
  • The Coca-Cola Company & Subsidiaries v. Commissioner, T.C. Docket No. 31183-15 (transfer pricing and foreign tax credits; 10-week trial) (multiple opinions; appeal pending)
  • Thomas & Betts Corporation & Subsidiaries v. Commissioner, T.C. Docket No. 4120-17 (transfer pricing; settled in 2019)
  • GlaxoSmithKline Holdings (Americas) Inc. v. Commissioner, T.C. Docket Nos. 18940-08 and 18941-08 (debt/equity and OID; full concession by IRS)
  • GlaxoSmithKline Holdings (Americas) Inc. v. Commissioner, T.C. Docket Nos. 5750-04 and 6959-05 (transfer pricing: US drug sales (then-largest tax case in US history); settled in 2006)
  • GlaxoSmithKline Holdings (Americas) Inc. v. Commissioner, 117 T.C. 1 (2001) (transfer pricing: preservation of testimony)
  • kgb and Subsidiaries v. Commissioner, T.C. Docket No. 4667-13 (transfer pricing; settled in 2017)
  • US Freightways Corp. v. Commissioner, 270 F.3d 1137 (7th Cir. 2001), rev’g 113 T.C. 329 (1999) (INDOPCO, judicial deference)

*Includes matters handled prior to joining Gibson Dunn

Sanford previously served as a Trial Attorney in the Tax Division of the U.S. Department of Justice where he received the Tax Division’s Outstanding Attorney Award.

Sanford is a Fellow in the American College of Tax Counsel. He is an adjunct professor in the Graduate Tax Program of Georgetown University Law Center, where he teaches “Survey of Transfer Pricing.” He is a co-author of “Transfer Pricing: Litigation Strategy and Tactics,” Bloomberg Tax, Transfer Pricing Portfolio 6932.

Sanford received his law degree in 1991 with high honors from Duke University Law School, where he was a member of the Alaska Law Review. He served as a law clerk for Judge Peter Hill Beer of the US District Court for the Eastern District of Louisiana. He earned a Bachelor of Arts degree cum laude from Yale University.

Sanford is admitted to practice in the District of Columbia, the United States Court of Appeals for the District of Columbia Circuit, the United States Court of Federal Claims, and the United States Tax Court.

Amber D. McKonly is an associate in the Orange County office of Gibson, Dunn & Crutcher. She is a member of the firm’s Labor and Employment, Class Actions, and Litigation Practice Groups.

She has been recognized in Best Lawyers: Ones to Watch® in America for Commercial Litigation and Litigation – Labor & Employment.

Amber’s practice focuses primarily on employment and class action litigation.  She has represented employers in class actions, collective actions under the Fair Labor Standards Act, representative actions under the California Private Attorneys General Act, and individual actions in both state and federal courts.  Amber represents employers in connection with a variety of California and federal law claims, including wage and hour, employment misclassification, discrimination, retaliation, and wrongful termination claims.  

  • Her recent successes include a complete trial victory in an exemption misclassification action, full defense victories in multiple discrimination, retaliation, and wrongful termination actions at summary judgment or following trial, defeating class certification of claims alleging wage and hour violations, and compelling arbitration of claims in PAGA representative actions.  
  • Her recent trial experience includes a federal bench trial in a copyright and unfair competition matter, multiple arbitrations in actions for alleged discrimination, retaliation, and wrongful termination, and a multi-week federal jury trial in an employment discrimination class action.  

Amber also has extensive experience advising employers on a broad range of issues, including personnel policies, employee handbooks, employee discipline and termination issues, and other employment-related matters, and represents clients in a wide variety of industries, including technology, finance, legal, real estate, retail, and aerospace.

Amber earned her law degree magna cum laude in 2017 from the University of San Diego School of Law, where she served as Managing Editor for the San Diego Law Review and was elected to the Order of the Coif.  While in law school, she served as a judicial extern to the Honorable M. Margaret McKeown of the Ninth Circuit Court of Appeals, the Honorable Erithe A. Smith of the U.S. Bankruptcy Court for the Central District of California, and the Honorable Cynthia A. Bashant of the U.S. District Court for the Southern District of California.  Prior to attending law school, Amber received her master’s degree in Philosophy from the University of Colorado in 2010, and completed her bachelor’s degree in Philosophy in 2008 at the University of Washington.

Amber is admitted to practice in the State of California.

Catherine (“Cate”) McCaffrey is an associate in the Washington, D.C. office of Gibson Dunn. She is a member of the firm’s Labor & Employment, Class Actions, and Litigation Practice Groups. In 2025, Cate was selected to the “2025 Washington DC Rising Stars list” by Super Lawyers®.  She has also been recognized in the area of Labor and Employment Law by Best Lawyers: Ones to Watch® in America. 

Cate has represented clients in a wide range of employment litigation matters, including cases involving allegations of discrimination, harassment, retaliation, wrongful termination, and wage-and-hour violations. Cate has significant experience in defending against employment-related class and collective actions. She has represented employers in federal district and appellate courts across the country, in mediation, and before federal agencies including the Equal Employment Opportunity Commission and the Occupational Safety and Health Review Commission. Her practice also includes sensitive, internal workplace investigations into matters including sexual harassment, discrimination, and whistleblower retaliation.

Cate also has extensive experience helping employers to navigate the changing legal landscape of Diversity, Equity, and Inclusion (“DEI”) following the Supreme Court’s decision in SFFA v. Harvard. She has helped numerous clients conduct privileged audits of their DEI programs, assess litigation and reputational risks, and forge creative paths to accomplish their DEI objectives in a lawful manner. Cate also serves as the primary editor of Gibson Dunn’s bi-weekly DEI Task Force newsletter, available here.

Recent representative litigation matters include:

  • Complete trial victory for major pharmaceutical company in an age discrimination jury trial;
  • Won appeal of closely-watched COVID-safety and whistleblower retaliation action brought by New York Attorney General;
  • Obtained partial dismissal of Occupational Safety and Health Administration citation before the Occupational Safety and Health Review Commission on behalf of a major shipping and logistics company;
  • Won summary judgment on behalf of a major food-delivery provider in a suit challenging the constitutionality of a New York City data collection law.

Before joining the firm, Cate served as a law clerk to the Honorable Jay S. Bybee of the U.S. Court of Appeals for the Ninth Circuit and the Honorable Ronnie Abrams of the U.S. District Court for the Southern District of New York. Cate received her law degree magna cum laude from Harvard Law School in 2019, where she was an oralist for the winning team in the 2018 Ames Moot Court competition. She also served as a technical editor on the Harvard Journal on Legislation and worked as a student attorney as part of Harvard’s Criminal Justice Appellate Clinic.

Prior to practicing law, Cate served as a Peace Corps volunteer in Mongolia. She graduated from Duke University in 2014 with a Bachelor of Arts in Public Policy Studies and in Asian & Middle Eastern Studies.

She is a member of the New York and the District of Columbia bars. She is admitted to practice before the U.S. Courts of Appeals for the Ninth Circuit, as well as the U.S. District Courts for the Southern and Eastern Districts of New York.

Amalia Reiss is an associate in Gibson, Dunn & Crutcher’s Washington, D.C. office. She is a member of the firm’s Litigation and Labor & Employment Departments.

She has been recognized in Best Lawyers: Ones to Watch® in America for Administrative/Regulatory Law, Appellate Practice, and Commercial Litigation.

Prior to joining Gibson Dunn, Mollie served as a law clerk to the Honorable Edith Brown Clement of the United States Court of Appeals for the Fifth Circuit, and the Honorable Andrew P. Gordon of the United States District Court for the District of Nevada.

Mollie received her J.D. cum laude from Harvard Law School in 2017, where she served as the Coordination & Outreach Chair for the Harvard Law Review. She graduated magna cum laude in 2012 from Princeton University with a Bachelor of Arts Degree in Politics.

Mollie is admitted to practice in the District of Columbia and is admitted to practice before the United States Court of Appeals for the First, Third, Fourth, Fifth, Sixth, Ninth and D.C. Circuits, as well as the U.S. District Courts for the District of Columbia and the Eastern District of Michigan.  She is a member of the firm’s Hiring Committee.

A partner in the Los Angeles office of Gibson, Dunn & Crutcher, Scott A. Kruse joined the firm in 1972 as a member of the Labor and Employment Department. From 1977 to 1979, he served as General Counsel to the Federal Mediation and Conciliation Service, Washington, D.C., participating in the mediation of national labor disputes. Since 1972, his labor practice has ranged the entire area of employment law matters for employers, including wage and hour matters and class actions, employment discrimination and wrongful termination litigation, employment agreements, unfair competition, affirmative action, union organizing resistance, negotiations, and arbitrations, NLRB and NMB practice, OSHA, and employee benefits. He has had extensive experience in federal and state courts and administrative proceedings, and with alternative dispute resolution. He spends significant time as well in counseling and preventive planning. His representations have included, for example:

  • Handling major wage and hour class actions in a variety of industries, including retail stores, manufacturing employees, service technicians, installers, drivers, emergency medical technicians, inventory takers, airport workers, and longshoremen.
  • Serving as chief negotiator for Delta Air Lines in its 2004 and 2006 critical negotiations with its pilots union (ALPA) that reduced pilot labor costs by half, including major pay and benefit reductions, productivity improvements, and termination of a defined benefit pension plan pursuant to agreements first negotiated with ALPA and then with the Pension Benefit Guaranty Corporation (PBGC).
  • Advising investment companies on labor and employment aspects of their acquisition and divestiture programs.
  • Representing a major airline and a major railroad in several critical interest arbitrations to decide the terms of new contracts with their unions.
  • Advising a State Governor re sex discrimination and pay equity matters in the State’s compensation structure.
  • Advising large and small companies in restructurings and layoffs.
  • Handling high-profile sex harassment litigation.

Mr. Kruse has been a member of the Committee on Equal Opportunity Law, Labor and Employment Section of the American Bar Association, serving as co-Chairman of its OFCCP Liaison Subcommittee, the ABA Airline and Railroad Labor Committee, and the International Bar Association’s Labor Committee. He has lectured and written extensively in the area of labor and employment law, including the following publications: “The New American Law of Wrongful Terminations” in the International Business Lawyer, “Giveback Bargaining” in the Personnel Journal, a section of a book regarding “Labor Aspects of Bankruptcy,” and an article regarding preparing for and handling OSHA inspections. Mr. Kruse has been named as a “Best Lawyer” in employment law by The Best Lawyers in America® from 2012-2026. He is a graduate of Princeton University and the Harvard Law School.

Megan Cooney is a partner in the Orange County office of Gibson, Dunn & Crutcher. She is a member of the firm’s Labor and Employment, Class Actions, and Litigation Practice Groups.

Megan’s practice focuses on high stakes employment and class action litigation. She has represented employers across the country in class actions, collective actions, representative actions under the California Private Attorneys General Act, and sensitive individual actions alleging a broad range of employment-related claims. Megan has extensive experience litigating wage and hour, discrimination, retaliation, harassment, and worker misclassification claims.

Megan also has extensive experience advising employers regarding personnel policies, employee handbooks, job classification, termination issues, and other employment-related matters. Megan also represents clients in connection with workplace investigations and compliance audits. She has represented clients in a wide variety of industries, including technology, finance, healthcare, retail, industrial services, manufacturing, entertainment, and transportation.

Megan has been recognized for delivering significant results for clients.  Lawdragon has recognized Megan in their guide of the 500 Leading Corporate Employment Lawyers since 2022 and, in 2023, included Megan in the inaugural 2023 Lawdragon 500 X – The Next Generation guide which highlights those “who will define where the legal profession of our country goes” and whose “leadership will be called upon by businesses and individuals when they face their crossroads.” She was also recognized by Law360 as one of five Rising Stars in Labor & Employment. Megan was recognized by The Best Lawyers in America in 2025 and 2026 for her work in Litigation – Labor and Employment, and as “One to Watch” for 2023.

Megan’s recent representative experience includes:

  • Complete trial victory for Amazon in an exemption misclassification action after defeating class certification and securing summary judgment on the federal claims. Ortiz v. Amazon.com LLC (Northern District of California).  This victory was recognized by the Daily Journal as a Top Defense Verdict for 2022.
  • Compelling arbitration of novel employment and consumer class action claims brought against retailer related to employee training programs. 
  • Defeating class certification for various technology, retail, and health care clients on wage and hour claims related to meal periods, rest breaks, overtime, compensable time, and other theories.
  • Representing various companies in class action litigation related to COVID-19 policies.
  • Full trial victory for Grubhub, Inc. in Lawson v. Grubhub Holdings Inc., et al. (Northern District of California), in the nation’s first common law “gig economy” independent contractor misclassification case to go to trial.
  • Representing major technology company in connection with Fair Labor Standards Act collective action relating to regular rate of pay. 
  • Securing voluntary dismissal of class and representative actions raising wage and hour violations.

Megan earned her law degree magna cum laude in 2013 from Pepperdine University where she was a Literary Citation Editor for the Pepperdine Law Review and a member of the Interschool Appellate Advocacy Team. She earned a Bachelor’s degree in Political Science in 2010 from California Lutheran University, graduating summa cum laude. Megan is a member of the State Bar of California.

Alex Bruhn is a litigation associate in the Washington, D.C. office of Gibson, Dunn & Crutcher.

He has been recognized in Best Lawyers: Ones to Watch® in America for Commercial Litigation, Employee Benefits (ERISA) Law, and Litigation – Labor and Employment since 2024.

Prior to joining the firm, he served as a law clerk for the Honorable James B. Loken of the United States Court of Appeals for the Eighth Circuit.

Alex received his Juris Doctor magna cum laude in 2017 from Harvard Law School, where he served on the Harvard Journal on Legislation. In 2014, he graduated summa cum laude from the University of Notre Dame with a Bachelor of Business Administration degree in finance and political science.

He is admitted to practice in New York and the District of Columbia.

Mark H. Mixon, Jr. is Of Counsel in the New York office of Gibson, Dunn & Crutcher and is a member of the firm’s Litigation and Securities Litigation Practice Groups.

Mark is a general corporate and commercial litigator who represents individual and corporate clients in complex, high-stakes business and corporate governance disputes, including commercial breach of contract actions, corporate-control litigation, disputes related to directors’ and controlling stockholders’ fiduciary duties, stockholder derivative and securities litigation, M&A-related litigation, and antitrust and competition matters. He frequently litigates in the Delaware Court of Chancery, where he clerked for the Honorable J. Travis Laster, the Honorable Tamika R. Montgomery-Reeves, and the Honorable Donald F. Parsons, Jr. Mark has been recognized in Best Lawyers: Ones to Watch in America™ (2024-2026), including for Securities Litigation, Commercial Litigation, and Corporate Governance.  

Mark has experience representing companies, boards, and investors across a wide range of industries:

Control Fights and Other Fiduciary Duty Litigation

  • Representing consumer tech venture capital firm and director in derivative litigation filed in the Delaware Court of Chancery regarding portfolio company board’s winding up.
  • Representing clinical-stage biopharmaceutical company in derivative litigation filed in the Delaware Court of Chancery regarding director and officer compensation.
  • Deer Park Road Mgmt. Co., LP – Represented alternative investment firm and board designees in obtaining favorable resolution of expedited arbitration and multiple Delaware Court of Chancery litigations regarding portfolio company founder’s alleged self-dealing and enforcement of preferred stockholder protections.
  • Represented independent power producer and control group in confidential arbitrations, securing partial pleading-stage and summary resolutions of disputes with investors regarding valuation and board representation.
  • Represented hedge fund and board designees in derivative litigation filed in the Delaware Court of Chancery regarding portfolio company’s allegedly conflicted lending transactions.
  • A Shoc Beverage, LLC – Defeated expedited preliminary injunction application in the Delaware Court of Chancery alleging serial entrepreneur and beverage startup breached fiduciary duties by usurping energy drink design and opportunity.
  • Represented fund owner in dispute under 8 Del. C. § 225 with credit enhancer and noteholders regarding ownership and control of certain portfolio companies.

Mergers & Acquisitions and Deal-Related Litigation.

  • MIH Learning B.V. – Represented Prosus N.V.’s edtech investment subsidiary in obtaining rare pleading-stage dismissal of entire fairness claims filed in the Delaware Court of Chancery regarding Skillsoft Corp.’s allegedly conflicted acquisition of Codecademy.
  • VMware Inc. – Defended cloud computing and virtualization company in Delaware Court of Chancery, obtaining favorable pre-trial settlement of entire fairness claims and post-trial appraisal arising from allegedly conflicted merger transaction with Pivotal Software, Inc.
  • South Jersey Industries, Inc. – Represented energy infrastructure company in federal litigations regarding acquisition by private investment fund.
  • Slack Technologies, Inc. – Represented software company and its board in federal litigation regarding acquisition by Salesforce, Inc.
  • Represented Fortune 200 multinational consumer goods company in indemnification dispute filed in the Delaware Court of Chancery arising from spinoff of healthcare division.
  • Vista Outdoor – Represented outdoor sports and recreation products conglomerate in federal litigation in obtaining summary judgment of fraudulent earn-out claims by the founders and sellers of stand-up paddle board company.

Complex Commercial and Antitrust

  • Coupang, Inc. – Obtained favorable pre-trial settlement for global e-commerce company in share ownership dispute filed by former employee in the Delaware Court of Chancery.
  • Secured temporary restraining order in Delaware Court of Chancery and payment of in-kind success fee on behalf of global law firm.
  • Amgen Inc. – Represented multinational biopharmaceutical company in expedited litigation filed in federal court regarding competitor’s breach of settlement agreement and related class antitrust claims.
  • Genentech, Inc. – Represented biotechnology company in securing dismissal of contract claims filed by competitor in the Delaware Court of Chancery.
  • Empire Merchants, LLC – Represented New York liquor distributor in connection with civil RICO lawsuit against Maryland liquor distributor and related advancement litigation in state and federal courts.

Stockholder Demands and Other Pre-Litigation Matters

  • Represented late-stage FinTech company in resolving potential litigation between founders, investors, and financing partner.
  • Represented private biotechnology investment fund in avoiding securities and fiduciary duty litigation with majority investor.
  • Represented investment banking and capital markets firm in responding to stockholder demand related to merger litigation.
  • Represented independent investment banking firm in responding to creditor demands concerning pre-bankruptcy representation of debtor.
  • Represented countless companies serving or responding to books and records demands under 8 Del. C. § 220, merger provisions, and operating agreements.

Mark maintains an active pro bono immigration practice. In partnership with Sanctuary for Families, Legal Services NYC, and Immigration Equality, he represents LGBT persons seeking asylum and other forms of immigration relief from U.S. Citizenship and Immigration Services and Immigration Courts. Mark is also a member of Sanctuary for Families’ Pro Bono Council.

Mark is admitted to practice in the State of Delaware and the State of New York, and before the United States District Courts for the District of Delaware, the Southern District of New York, and the Eastern District of New York.

Before joining Gibson Dunn, Mark earned his Juris Doctor magna cum laude in 2015 from the University of Pennsylvania Law School, where he was an executive editor of the University of Pennsylvania Journal of Business Law. He also earned a Master of Education in higher education in 2012 and a Bachelor of Science in Energy Business and Finance in 2011 from the Pennsylvania State University.

Marissa Moshell Mulligan is an associate in the Los Angeles office of Gibson, Dunn & Crutcher. She practices in the firm’s Litigation Department, and in its Media, Entertainment & Technology, Trials, and Appellate and Constitutional Law Groups.

Marissa has represented clients in complex commercial litigation in both the trial courts and on appeal. She has experience litigating all stages of disputes, including in the areas of breach of contract, profit participation, and defamation.

Marissa has been recognized by Best Lawyers: Ones to Watch® in America for Entertainment and Sports Law (2024-2026). She was also recognized as a “Rising Star” by Super Lawyers® (2023-2025).

Recent representative matters include:

  • Successfully represented AMC in a first phase bench trial in Los Angeles regarding profit participation and breach of contract claims concerning the television series The Walking Dead. Following the trial, Marissa helped achieve summary adjudication for AMC on a remaining claim.  Marissa currently represents AMC in connection with another The Walking Dead litigation in federal court in California.
  • Representing Joy Reid in a defamation action in the Eastern District of New York concerning certain social media posts published in 2018.
  • Representing Ashley Judd in her ongoing civil action against Harvey Weinstein.  Marissa was part of the team that secured a critical Ninth Circuit victory, which reversed the district court’s dismissal of Judd’s sexual harassment claim.
  • Secured a complete victory for NBCUniversal following an arbitration related to CNBC’s show The Profit.  Marissa helped defend NBCU against fraud, defamation, conspiracy, and other claims, defeating a $30 million claim for damages.
  • Defended Rachel Maddow, MSNBC, NBCUniversal, and Comcast in a defamation case brought by Herring Networks, owner of One America News Network.  The case was thrown out in the district court, and the Ninth Circuit affirmed in a unanimous published decision.
  • Representing HBO in the district court and Ninth Circuit Court of Appeals against claims filed by Michael Jackson’s Estate over the documentary Leaving Neverland.
  • Represented EMI in a dispute regarding music publishing royalties.
  • Represented a major entertainment company in an arbitration concerning a television series breach of contract dispute that arose in the wake of the COVID-19 pandemic.
  • Represented a major entertainment company in a profit participations dispute concerning a television franchise.
  • Represented a large television studio in two arbitrations concerning profit participation actions brought by the shows’ creators.

Marissa earned her law degree in 2017 from the Georgetown University Law Center, where she graduated magna cum laude, and was elected to the Order of the Coif. At Georgetown, she served as the Online Development Editor for the American Criminal Law Review and President of the Georgetown Entertainment and Media Alliance, Law Division. Marissa graduated cum laude in 2014 from Georgetown University, where she received her Bachelor of Arts degree in English Literature, Psychology, and Film Studies.

She is admitted to practice law in the State of California, and is admitted to practice law before the United States District Court for the Central District of California and the United States Court of Appeals for the Ninth Circuit.

Courtney M. Brown is a partner in the Washington, D.C. office of Gibson, Dunn & Crutcher, where she practices primarily in the areas of white collar criminal defense and corporate compliance. Courtney has experience representing and advising multinational corporate clients, boards of directors, and executives in internal and government investigations and enforcement actions on a wide range of topics, including anti-corruption, anti-money laundering, economic sanctions, financial and accounting, and tax fraud matters.

Courtney has been recognized as a leading lawyer by Chambers USA in the District of Columbia for Litigation: White-Collar Crime & Government Investigations. She has also been recognized in The Best Lawyers in America® guides for her work in Criminal Defense: White-Collar (2024-2026).

Courtney also counsels corporations on the effectiveness of their compliance programs and in connection with transactional due diligence, with a particular emphasis on compliance with anti-corruption laws, anti-money laundering regulations, and economic and trade sanctions administered by the U.S. Department of Treasury’s Office of Foreign Assets Control.

Selected investigation and enforcement matters include:

  • Represented a multinational information technology company in negotiating resolutions of claims brought by the U.S. Department of Justice (“DOJ”) and Securities and Exchange Commission (“SEC”) under the U.S. Foreign Corrupt Practices Act (“FCPA”), including successful completion of a post-resolution reporting period.
  • Represented a global telecommunications company in a resolution with DOJ regarding non-criminal breaches of a Deferred Prosecution Agreement.
  • Represented a financial services firm in negotiating a declination under DOJ’s Corporate Enforcement Policy.
  • Conducted an investigation for the Board of Directors involving allegations of insider dealing against executives.
  • Representing a Special Litigation Committee of the Board of Directors of a pharmaceutical wholesale distribution and service provider in shareholder derivative litigation regarding Board oversight of the company’s compliance program.
  • Conducted a workplace investigation on behalf of a Special Committee of the Board of Directors.
  • Represented an investment manager in an SEC investigation involving allegations of false advertising and securities regulations violations.
  • Represented a defense company, obtaining declinations of criminal and civil enforcement actions by the DOJ and SEC in FCPA investigations, as well as the dismissal of an employment lawsuit brought by a former employee.
  • Obtained declinations, on behalf of a Fortune 500 company, of criminal and civil enforcement actions by the DOJ and SEC in a joint FCPA investigation arising from whistleblower complaints.
  • Represented banks and asset managers in investigations by the DOJ, SEC, congressional committees, and state investigators relating to subprime mortgage matters and the Madoff fraud.

Courtney has participated in two government-mandated FCPA compliance monitorships and conducted anti-corruption and compliance trainings for in-house counsel and employees. Courtney also completed a secondment at a Fortune 100 company, where she advised global legal and business teams on compliance with anti-corruption laws.

Courtney received her law degree in 2008 from the University of Chicago Law School. Prior to law school, she worked for the Chairman of the U.S. Senate Health, Education, Labor and Pensions Committee. Courtney earned her undergraduate degree from Harvard University, where she was co-captain of the NCAA Division I championship women’s crew team and an All-American selection in rowing. Courtney is a member of the bars of the District of Columbia and Virginia.

Rohit Karamchandani is a Senior Tax Advisor in the London office of Gibson Dunn and a member of the firm’s Tax Practice Group.

Rohit advises clients on a broad range of domestic and cross-border tax matters, including in relation to mergers and acquisitions, private equity, corporate reorganisations, real estate, corporate finance and capital markets. Rohit also has experience assisting clients with UK tax authority enquiries. He has advised institutional investors, alternative asset managers, private equity firms, multinational enterprises and family offices.

Prior to joining Gibson Dunn, Rohit was a senior tax advisor in the London office of another global law firm. Rohit is a qualified Chartered Tax Adviser and Chartered Accountant.

Jon Greenberg is a litigation associate in the New York office of Gibson Dunn. He represents clients in complex commercial and securities litigation matters and class actions.

Jon graduated from Columbia Law School in 2024 where he was recognized as a James Kent Scholar and a Harlan Fiske Stone Scholar. He also served as an articles editor on the Columbia Journal of Transnational Law, as a teaching assistant for Complex Litigation, and as a judicial extern to judges of the U.S. District Court for the Southern District of New York and the Second Circuit Court of Appeals. He received his Bachelor of Arts in History and South Asian Studies, cum laude, from Yale University in 2019.

He is admitted to practice in the State of New York.

William J. Moccia is Of Counsel in the New York office of Gibson Dunn. He is a member of the firm’s Litigation Department, Appellate and Constitutional Law Practice Group, and Law Firm Defense Practice Group.

William has represented a broad range of clients in high-stakes constitutional, commercial, and appellate litigation across numerous substantive fields, including First Amendment, takings, breach of contract, civil RICO, securities fraud, commodities manipulation, and law firm defense. He practices in federal and state court and has plaintiff- and defense-side experience at both the trial and appellate levels. In addition to his extensive brief-writing experience, William has represented clients as “first chair” both in the courtroom and at depositions.

Among other representative matters, William played a leading role in two groundbreaking victories before the United States Supreme Court. First, he was the senior associate representing the plaintiff in The Roman Catholic Diocese of Brooklyn, New York v. Cuomo, a successful free exercise challenge to onerous State-imposed restrictions on in-person church attendance during the COVID-19 pandemic. That representation yielded a landmark Supreme Court decision that one commentator described as “one of the two most significant religion cases of the past 30 years.” Second, William was a senior member of the team representing a group of small New York landlords and the Rent Stabilization Association of NYC, Inc. in their constitutional challenge to New York State’s COVID-19 eviction moratorium. According to data published by Reuters, the Supreme Court’s decision granting an emergency injunction pending appeal in that case marked the first time the Court granted such relief to private litigants outside the religious liberties context since the inception of the pandemic, with nearly 100 prior applications having been denied.

William was also a core member of the litigation team that won a sweeping summary judgment victory in the Southern District of New York—unanimously affirmed on appeal—on behalf of Vista Outdoor Inc. in a case arising from an earn‑out dispute with the founders of stand-up paddleboard company Jimmy Styks.

William was included in the 2023-2026 editions of the Best Lawyers: Ones to Watch® in America for his work in Appellate Practice and Commercial Litigation.

William was one of two individual recipients of Gibson Dunn’s 2022 Frank Wheat Memorial Award, which honors attorneys who have “demonstrated leadership and initiative in their pro bono work, obtained significant results for their pro bono clients, and served as a source of inspiration to others.” He received the award in recognition of his successful pro bono representation of a Coast Guard veteran who had struggled for years to correct her military discharge records and secure a medical retirement based on PTSD she developed in 2001, when she was raped by her direct superior while on active duty.

Prior to joining Gibson Dunn, William served as a law clerk to the Honorable Christopher F. Droney of the United States Court of Appeals for the Second Circuit and the Honorable Edgardo Ramos of the United States District Court for the Southern District of New York.

William earned his Juris Doctor in 2012 from Yale Law School, where he was a Notes Editor on The Yale Law Journal. He received his Bachelor of Arts, summa cum laude, from Fordham University in 2009.

William is admitted to practice in the State of New York, before the United States District Courts for the Southern and Eastern Districts of New York, and before the United States Court of Appeals for the Second Circuit.