Paul Yu is an associate in the San Francisco office of Gibson, Dunn & Crutcher. Paul focuses his practice on the representation of non-bank financial institutions, financial services and financial technology companies, digital asset platforms, payment networks, and investment firms in areas related to the provision of payments.

Paul has advised clients on issues related to global product development, enforcement actions, and regulatory compliance, as well as acquisitions, investments, and commercial arrangements between parties in the global payments space.

Paul regularly counsels clients on compliance with federal and state law applicable to electronic payments, mobile payments, digital assets (including cryptocurrency and stablecoins), in-game currencies, and prepaid access, including state and federal money transmission laws and licensing regimes, state and federal gift card laws, Regulation E, and the Bank Secrecy Act.

Paul’s experience includes: *

  • Advised launch of a stablecoin product that will enable customers in Brazil 24/7 access to USDC.
  • Advised a financial technology company, which offers a digital ecosystem with in-game currencies, on various regulatory matters, including its acquisition by an investment group.
  • Advised a private equity firm in its acquisition of a majority stake in one of the largest global payment processors.
  • Advised a leading financial technology company on a variety of regulatory matters, including product development, maintenance of financial services licenses, and commercial agreements
  • Provided counsel to a multinational technology conglomerate during the introduction of an international e-commerce payment solution.

*Includes work performed at a previous firm.

Allonna Nordhavn is an associate in the Washington, D.C. office of Gibson, Dunn, and Crutcher. She practices in the firm’s Litigation Department.

Allonna earned her Juris Doctor from the University of California, Berkeley School of Law. While in law school, Allonna externed at the Oakland City Attorney’s Office and participated in the East Bay Community Law Center’s Education Defense & Justice for Youth Services clinic. Allonna also served as the Senior Articles Editor of the Berkeley Journal of Black Law and Policy. Before attending law school, Allonna earned a Bachelor of Arts in Political Science from Columbia University.

Allonna is admitted to practice in the District of Columbia. 

Bernard Grinspan is a French and New York qualified partner in the Paris office of Gibson Dunn.

For more than twenty years, Bernard has advised publicly traded and privately held business entities on mergers and acquisitions and joint ventures and works closely with clients to provide guidance on strategic and financial investments. In addition, he works regularly on debt restructuring and insolvency matters. He also has notable experience in distributorship and licensing agreements as well as FCPA investigations. He has been instrumental in ‘getting the deal done’ in a number of highly visible transactions within the French business community.

Bernard is known to be creative in his approach to client’s issues, with a constant view to explore all possible avenues available, including those combining negotiations and litigation. He has been essential in a number of cross-border deals where litigation and corporate teams are formed and coordinated to maximize client’s results. Before joining Gibson Dunn’s Paris office in 1990, Bernard spent nine years in the United States, first as a student at the Harvard Law School, then as a practicing attorney in New York, working successively at White and Case, Schlumberger Limited and Davis Polk & Wardwell. His two-and-a-half-year experience at Schlumberger gave him an excellent insider’s view of the corporate world, rather unique in law firms as he was involved in the practical implementation of deals as well as their negotiation.

Chambers & Partners Global has consistently ranked Bernard as a “foreign expert” for USA-related Corporate/M&A work, noting that he is “well regarded” by clients for his experience and “valued opinions.” Previous editions commented that he is a “completely bilingual, extremely strategic and practical M&A expert” ; “a strong choice for complex cross-border transactions.” Chambers has also noted that the practice “benefits greatly from Bernard Grinspan’s US legal expertise and experience when it comes to handling major transatlantic deals”.

Legal 500 EMEA recommends him for M&A and Private Equity. Previous editions have described him as a “highly regarded” partner “who puts all his energy in to get a deal done”, “well placed to assist clients on complex transactions” and providing “creative advice that goes beyond the pure legal aspects”. Bernard shows an “innate understanding of business and human relationships,” directories say. In addition, Best Lawyers in France has consistently ranked him for Corporate Law and Information Technology Law over the years.

Bernard plays a major role in the growth of Gibson Dunn’s European practices. He was and continues to be instrumental in the development of the firm’s European offices into high quality legal service providers, capable of advising foreign clients on the laws of their respective jurisdictions.

He is fluent in French and English.

Miguel Loza, Jr. is Of Counsel in Gibson Dunn’s Los Angeles office, where he practices in the Firm’s Litigation Department. Miguel focuses on complex litigation matters, with a particular expertise in transnational issues and cases arising out of Latin America. He also has significant experience handling white collar investigations, as well as high-stakes matters involving Alien Tort Statute, Torture Victim Protection Act, RICO, environmental, chemical exposure and supply chain allegations.

Miguel has played a major role in several noteworthy business and commercial matters involving important transnational litigation issues. He has extensive experience managing issues that arise in foreign and U.S. courts as part of a comprehensive global litigation defense strategy for the client. These issues include, among other things, securing positive results in multiple jurisdictions simultaneously, and also guiding and managing transnational matters to avoid vexatious litigation, inconsistent rulings and waiver of defenses in subsequent jurisdictions. Additionally, Miguel has litigated several cases dealing with the recognition and enforcement of foreign country judgments, with a particular focus on developing legal strategies to prevent the recognition of suspect foreign judgments in U.S. courts.

He is fluent in Spanish and works extensively with foreign attorneys throughout Latin America and Europe, advising clients on the multifaceted issues that characterize cross-border litigation and investigations and formulating comprehensive strategy plans to manage and guide the cross-border matters to a successful resolution for the client. Miguel is adept at selecting and working with foreign legal experts from varied backgrounds to assist clients in addressing difficult transnational issues and to prepare and present expert testimony before U.S. courts and international tribunals. Additionally, he advises clients on media strategies that are key components of a well-developed transnational litigation plan.

Miguel has also gained substantial experience defending clients involved in white collar government investigations and assisting clients in responding to government agency subpoenas. He has represented clients in connection with alleged violations of sales and marketing regulations, health regulations, environmental regulations, Food and Drug Administration regulations and other administrative matters. Miguel has also worked on international and cross-border white collar investigations in Latin America arising out of the Foreign Corrupt Practices Act issues, including compliance monitorship work in Argentina and Mexico that involved substantial Spanish-language witness interviews.

Representative matters include:

  • Chevron Corp. – Ecuadorian Judgment. Fighting on a global scale to prevent the recognition and enforcement of an $18 billion Ecuadorian judgment against the company and assisting with development and execution of successful defense strategy in various Latin American jurisdictions.
  • Hupan v. Alliance One. Representing client in six cross-border chemical exposure suits filed against more than a dozen multi-national defendants by Argentine citizens and involving choice of law and forum issues and securing forum non conveniens dismissal in the principal Delaware suit.
  • Tellez v. Dole Food Co. Obtaining dismissal with prejudice of U.S.-filed toxic tort claims alleging that DBCP caused reproductive harm to Nicaraguan plaintiffs.
  • Dole Food Co., Inc. v. S.C.L.A. Securing a writ of error coram vobisto reopen an appealed jury verdict in a toxic tort case based on evidence of extrinsic fraud and due process violations.
  • Osorio v. Dole Food Co. Blocking recognition and enforcement in federal district court of a $97 million toxic tort judgment awarded by a Nicaraguan court without due process or evidence of causation and securing appellate affirmance of the trial court decision.
  • You v. Japan. Defending vehicle manufacturers against alien tort and RICO claims brought on behalf of a purported class of Korean citizens and securing dismissal based on failure to state a claim.
  • Wang Hui v. F+A Architects. Defending Qatar-based client in California personal injury action and securing dismissal based on lack of personal jurisdiction.
  • Worldwide Directories S.A. de C.V. v. Yahoo! Inc. Defending client against a $2.75 billion civil RICO claim brought by two Mexican companies in federal New York court and securing dismissal based on deficient RICO allegations.
  • Leading E-cigarette company. Defending the company in multiple investigations by state Attorneys General regarding sales and marketing practices and alleged violations of environmental and health regulations.
  • Siemens AG. Helping Gibson Dunn team conduct the compliance monitorship for the company, pursuant to the then largest-ever FCPA resolution with the SEC and DOJ.
  • Norwood v. Bourland. Representing pro bono client and vacating district court judgment that denied important First and Eighth Amendment civil rights claims.

Recent publications:

Miguel is a proud first-generation college graduate and first-generation professional. He is deeply committed to the Firm’s diversity and mentoring efforts, pro bono work and community service. Miguel is actively involved in the firm’s local and national recruiting and diversity efforts, and serves on the Firm’s LA office Diversity Committee. He also devotes time to the Firm’s mentoring efforts and co-leads the LA office affinity groups for Hispanic/Latinx and First-Generation attorneys. Miguel is actively engaged in the Firm’s pro bono matters, focusing particularly on immigration and social justice matters.

Since 2012, Miguel has been a trustee of the Mexican American Bar Foundation, an organization committed to diversity in the legal profession that awards more than $250,000 in scholarships every year to Latinx students in LA-area law schools. Since 2021, Miguel has also been a member of the Board of Directors for Families Forward Learning Center, a learning facility in Pasadena committed to working with underserved and underprivileged pre-school-aged children and their parents to prepare the children for academic success.

In 2020, Miguel was selected for membership in the Pacific Council on International Policy, which seeks to give the West Coast a stronger and more effective voice in global affairs. Miguel participated in the Los Angeles County Bar Trial Advocacy Program in 2014 and worked at the Los Angeles City Attorney’s Office as a Pro Bono Deputy City Attorney where he was first chair in two jury trials. He is also a member of the American Bar Association, the Los Angeles County Bar Association, the Hispanic National Bar Association, the Mexican American Bar Association and the Association of Business Trial Lawyers.

Miguel earned his law degree in 2008 from Cornell Law School, where he served as a Managing Editor of the Cornell International Law Journal, and as a student contributor to the Supreme Court Bulletin of the Cornell Legal Information Institute. During law school, he was selected to serve as an Honors Teaching Fellow for the Cornell Lawyering Program and received the law school’s Kasowitz Prize for Excellence in Legal Writing and Oral Advocacy. Miguel served as the Academic Chair for the Latino Law Students Association at Cornell Law School. He earned a Bachelor of Arts degree in 2005 from Stanford University, with a double major in History and Political Science.

Miguel is a member of the California bar and is admitted to appear before the United States District Courts for the Central and Northern Districts of California, the Ninth Circuit Court of Appeals and all California state courts.

Gabriel Herrmann is a partner in the New York office of Gibson, Dunn & Crutcher, and a member of Gibson Dunn’s Litigation Practice Group. His practice focuses on complex business and financial-services litigation, including disputes concerning commercial breach of contract claims, fraud and business torts, insolvency-related litigation, disputed interests in real property, shareholder derivative and securities litigation, antitrust and competition law, insurance, class actions, and M&A-related litigation.

A substantial portion of his experience concerns matters involving cross-border jurisdictional issues, coordination of parallel overseas proceedings, and international choice-of-law and venue considerations. In addition to his commercial practice, Gabriel has significant experience representing clients in matters relating to the operations of New York State and City governmental entities, including both administrative and judicial review of agency determinations and constitutional challenges to government action and legislation. He practices actively in the federal district and bankruptcy courts, as well as the civil and Commercial Division courts of New York State, and has extensive appellate experience in both the New York State and federal court systems.

Representative matters include:

  • Picard v. JPMorgan Chase & Co. (In re Bernard L. Madoff Investment Securities LLC), 460 B.R. 84 (S.D.N.Y. 2011), aff’d, 721 F.3d 54 (2d Cir. 2013), cert. denied sub nom., Picard v. HSBC Bank PLC, 134 S. Ct. 2895 (2014) (dismissal for lack of standing of Securities Investor Protection Act trustee to sue third parties for alleged harm to customers of insolvent securities broker-dealer).
  • Mashreqbank PSC v. Ahmed Hamad Al Gosaibi & Bros. Co., Index No. 601650/2009, 2010 WL 9535130 (Sup. Ct. N.Y. Cnty July 26, 2010), rev’d, 101 A.D.3d 1, 951 N.Y.S.2d 124 (1st Dep’t 2012), rev’d, 23 N.Y.3d 129, 989 N.Y.S.2d 458 (2014) (dismissal under doctrine of forum non conveniens of fraud and related business-tort claims against Saudi national).
  • Rubens v. UBS AG, 126 A.D.3d 421, 5 N.Y.S.3d 55 (1st Dep’t 2015) (enforcement of contractual forum-selection clauses compelling dismissal of action for breach of contract and related business torts against Swiss bank).
  • Knopick v. UBS AG, 137 F. Supp. 3d 728 (M.D. Pa. 2015) (enforcement of contractual forum-selection clauses compelling dismissal of action for breach of contract and related business torts against Swiss bank, Swiss financial advisor, and Swiss national).
  • Giordano v. UBS AG, 134 F. Supp. 3d 697 (S.D.N.Y. 2015) (dismissal of claims against Swiss bank based on enforcement of contractual forum-selection clauses, failure to allege adequate basis for personal jurisdiction, and failure to state a claim).
  • N.Y. City Educational Construction Fund v. Verizon New York Inc., Index No. 650193/2009, 2012 WL 2368984 (Sup. Ct. N.Y. Cnty. June 11, 2012), aff’d, 114 A.D.3d 529, 981 N.Y.S.2d 11 (1st Dep’t 2014) (dismissal of fraud, breach-of-contract, and related claims concerning transfer of zoning development rights in contract for sale of real property).
  • In re Kosmos Energy Ltd. Securities Litigation, 299 F.R.D. 133 (N.D. Tex. 2014) (denial of class certification in securities action under sections 11 and 12 of the Securities Act of 1933).
  • Berks County Employees’ Retirement Fund v. First American Corp., 734 F. Supp. 2d 533 (S.D.N.Y. 2010) (denial of class certification in securities-fraud action under section 10(b) of the Securities Exchange Act of 1934).
  • Harrison v. Metropolitan Life Insurance Co., 417 F. Supp. 2d 424 (S.D.N.Y. 2006) (ERISA preemption; construction of insurance contract).

Recent Speaking Engagements:

  • Speaker, “Recent and Pending Amendments to New York’s Civil Practice Law and Rules and Uniform Commercial Division Rules,” Lawline (July 29, 2016).
  • Speaker, “December 2015 Amendments to the Federal Rules of Civil Procedure: Key Components and Recent Case Law,” Clear Law Institute (April 29, 2016).
  • Speaker, “December 2015 Amendments to the Federal Rules of Civil Procedure,” Lawline (March 10, 2016).
  • Speaker, “Proportionality in Discovery Under the New Federal Rules of Civil Procedure,” National Business Institute (February 29, 2016).

Gabriel earned his Juris Doctor, cum laude, from the Cornell Law School in 2003, where he served as an Article Editor of the Cornell Law Review, published a Note, Discovering Policy Under the Federal Arbitration Act, 88 Cornell L. Rev. 779 (2003), and served as a research assistant to the late Professor Theodore Eisenberg. He received a Bachelor of Arts degree from Clark University in 1998.

Gabriel is admitted to practice in the State of New York, as well as before the United States District Courts for the Southern and Eastern Districts of New York and the United States Courts of Appeals for the Second and Third Circuits. He is a member of the Association of the Bar of the City of New York, the American Bar Association, and the ABA Section of Antitrust Law.

Joel Kagan is an Associate in the Litigation Department at Gibson, Dunn & Crutcher, where he focuses on general commercial litigation, media and entertainment, and antitrust matters. He has experience on teams handling a range of complex disputes and investigations across a wide variety of industries, including consumer product goods, private equity and financial institutions, media and entertainment, pharmaceuticals, and transportation and logistics. Joel also maintains an active pro bono practice, including in immigration and asylum matters, and veteran’s benefits appeals.

Before joining Gibson Dunn, Joel received his B.A., magna cum laude, from the University of Pennsylvania, where he studied Philosophy, Politics & Economics (PPE). During college, he was a member of the Men’s Division-I Varsity Heavyweight Rowing team, and during the summers competed for New York Athletic Club, winning national championship medals for both teams. Before attending law school at New York University School of Law, Joel worked as a paralegal in the Appeals Bureau of the Manhattan District Attorney’s Office. During law school, Joel was an Executive Editor on the New York University Law Review and was a judicial intern to the Honorable Richard J. Sullivan on the United States Court of Appeals for the Second Circuit. He also worked as a Research Assistant for Professor Helen Hershkoff, preparing the annual supplementation to Section 3655 of the Wright & Miller treatise on Federal Practice and Procedure, concerning actions against federal agencies and officers.

Joel is admitted to practice in New York State.

Anne MacPherson is Director of Practice Development, UK Finance & Transactions.

Anne has a broad range of corporate experience with a particular focus on banking and debt finance. Anne began her career at a magic circle law firm (London, Hong Kong and New York offices) where she trained and practised as a project finance lawyer. Before joining Gibson Dunn, she was a banking partner in the London office of a leading U.S. law firm.

Clare F. Steinberg is an of counsel in the Washington, D.C. office of Gibson, Dunn & Crutcher, where she practices in the firm’s Litigation Department. Her practice focuses on class actions, with an emphasis on health care, consumer product, and employment matters. She defends clients in complex civil litigation in federal and state courts. She has also defended clients facing civil investigation by federal regulators. Clare has an active pro bono practice, which focuses on immigration matters. She has represented individuals seeking asylum or Special Immigrant Juvenile Status.

Prior to joining Gibson Dunn, she served as a law clerk to the Honorable Ellen Lipton Hollander in the United States District Court for the District of Maryland.

Clare received her law degree with honors from the University of Chicago Law School. Prior to law school, she was a paralegal in the Philadelphia office of Pepper Hamilton. In 2011, Clare earned a Bachelor of Arts degree in Political Science from Johns Hopkins University, where she was elected to Phi Beta Kappa.

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

Timothy Sun is Of Counsel in the New York office of Gibson, Dunn & Crutcher. He is a member of the Litigation, and Appellate and Constitutional Law Practice Groups

Timothy has been recognized for Appellate Practice in the yearly editions of Best Lawyers: Ones to Watch® in America since 2023.

Prior to joining Gibson Dunn, Timothy served as a law clerk to the Honorable Michelle T. Friedland 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.

He earned his Juris Doctor in 2013 from the University of California, Berkeley, School of Law, where he was elected to the Order of the Coif. At Berkeley, Timothy was a notes & comments editor on the California Law Review. He received his Bachelor of Arts degree magna cum laude from Dartmouth College in 2006.

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

Jeremy Ochsenbein is Of Counsel in the Denver office of Gibson, Dunn & Crutcher. He is a member of the firm’s Litigation Department as well as its Government Contracts Practice Group, Environmental Litigation and Mass Tort Practice Group, Law Firm Defense Practice Group, Labor and Employment Practice Group, and the White Collar Defense and Investigations Practice Group. Prior to joining the Denver office, Jeremy worked in the firm’s Los Angeles office.

Jeremy has significant experience preparing dispositive motions and handling complex discovery and motion practice in state and federal courts. He has assisted clients with federal and California False Claims Act and whistleblower claims, with particular focus on qui tam actions filed against educational institutions. Additionally, Jeremy has defended clients in a range of environmental matters. He also has significant experience representing national law firms in liability actions.

Representative matters in which Jeremy has served as a key member include:

  • Representing a for-profit educational institution against False Claims Act allegations in related actions brought by two former employees, resulting in a dismissal of all claims by after the Southern District of Florida granted Gibson Dunn’s motions for summary judgment. Both summary judgment orders were subsequently affirmed on appeal by the Eleventh Circuit.
  • Representing a for-profit educational institution against False Claims Act allegations premised on “phantom student” allegations, resulting in a dismissal of all claims after the District of Nevada granted Gibson Dunn’s motion for summary judgment. The district court’s grant of summary judgment was subsequently affirmed on appeal by the Ninth Circuit.
  • Representing a for-profit educational institution against retaliation claims brought by a former employee brought pursuant to the California False Claims Act, with the court dismissing all claims based on Gibson Dunn’s demurrer, a decision which was subsequently affirmed by a California Court of Appeal.
  • Represented a Fortune 500 corporation and its subsidiaries in a mass tort suit brought by approximately 1,500 property owners and other individuals alleging property damages and personal injury claims based on allegations of vapor intrusion of petroleum hydrocarbons in housing development in Carson, California, including conducting discovery on individual plaintiffs and assisting with summary judgment motions and motions to exclude plaintiffs’ experts. The case ultimately resulted in a favorable settlement after the exclusion of one of the plaintiffs’ key experts.
  • Representing an AmLaw 100 law firm against malpractice and breach of fiduciary duty claims brought by the third-party beneficiary of a trust, including preparing and arguing a demurrer in Los Angeles Superior Court that resulted in the dismissal of all claims.
  • Representing an AmLaw 100 law firm against claims of malpractice, California False Claims Act violations, breach of contract, and equitable indemnity stemming from one of the largest municipal corruption scandals in California history, obtaining a voluntary dismissal of all claims with prejudice and a costs award prior to the close of discovery.
  • Representing a former government defense contractor in a cost recovery action involving trichloroethylene (TCE) and perchlorate contamination.
  • Representing a major hotel-casino operator in an action for breach of contract and other claims arising out of a promotional agreement related to a major poker tournament, resulting in a settlement prior to the close of discovery.
  • Representing a non-profit entity engaged in a public-private partnership with the State of California against First Amendment and California constitutional claims stemming from a contract dispute.
  • Representing an international environmental advocacy group in a quiet title action involving a dispute over a property boundary defined by a river, including serving as first chair for a two-day bench trial in the Routt County (CO) District Court, resulting in a victory that secured the client’s property interests and an award of costs and expert fees.
  • Representing a medical products company in an investigation by the Department of Justice regarding allegations of improper marketing of products.
  • Representing a Fortune 500 technology company in an investigation involving the Federal Trade Commission.

Jeremy earned a Juris Doctor in 2009 from the Duke University School of Law, where he served on the Editorial Board of the Duke Law Journal. He was a Trustee Scholar at the University of Southern California, graduating magna cum laude with a major in Environmental Studies and earning Phi Beta Kappa honors. Jeremy also received a Master of Planning and Master of Public Administration from the University of Southern California. Prior to attending law school, Jeremy worked as a planner for cities in the Southern California area.

Jeremy is admitted to practice law in the states of Colorado and California, and has also been admitted to practice before the United States District Courts for the Central and Southern Districts of California and the District of Colorado.

Katie Magallanes is Of Counsel in the Orange County office of Gibson, Dunn & Crutcher. She currently practices in the firm’s Labor and Employment, Class Actions, and Litigation Practice Groups.

Her practice focuses on employment and class action litigation in California. She has represented employers in class actions, representative actions under the California Private Attorneys General Act, and individual actions in state and federal court alleging wage and hour violations, discrimination, retaliation, harassment, and employment misclassification. Katie has also represented clients in complex business litigation, including complex high-stakes contract disputes and shareholder derivative lawsuits. She has supported clients in defeating class certification, obtaining summary judgment, and compelling representative actions to arbitration. She has also obtained favorable settlements in multiple actions, including after securing voluntarily dismissal of all class and representative claims.

Katie has been recognized by Best Lawyers: Ones to Watch® in America for Litigation – Securities (2024-2025).

Katie has extensive experience advising employers regarding personnel policies, employee handbooks, termination issues, and other employment-related matters, and has represented clients in connection with workplace investigations and compliance audits. She has represented clients in a wide variety of industries, including technology, retail, and transportation.

She earned her law degree magna cum laude in 2014 from the University of San Diego School of Law where she served as research editor of the San Diego Law Review and was elected to the Order of the Coif. During law school, Katie served as a judicial extern for the Honorable William Q. Hayes in the Southern District of California and interned in the Civil Division of the U.S. Attorney’s Office. She earned a bachelor’s degree in History in 2006 from the University of Southern California, graduating with Departmental Honors. Before law school, she served as an academic advisor at U.C. San Diego.

Katie is a member of the State Bar of California.

Zach Kady is of counsel in the New York office of Gibson, Dunn & Crutcher and a member of Gibson Dunn’s Litigation and International Arbitration Practice Groups.

Zach has extensive experience in domestic and international commercial arbitrations as well as investor-state arbitrations. He has represented clients before the American Arbitration Association (AAA), International Centre for Dispute Resolution (ICDR), JAMS, International Centre for Settlement of Investment Disputes (ICSID), the London Court of International Arbitration (LCIA) and the Singapore International Arbitration Centre (SIAC). Zach has particular experience in complex contract disputes as well as cases relating to valuations, supply agreements, licensing agreements, and mining and energy projects.

In addition to arbitration work, Zach has handled several domestic litigation disputes where he represents clients from various industries, including insurance, energy, technology, media, and music/entertainment. He has significant experience in state and federal court litigation seeking relief in aid of arbitration, disputes regarding arbitrability, the enforcement of arbitration agreements, and the pursuit of complex, creative, multi-jurisdictional strategies for the enforcement of arbitral awards.

Zach also devotes significant time to pro bono projects working on behalf of aggrieved inmates and immigrants seeking asylum or other protections from removal.

Zach earned his Juris Doctor, cum laude, in 2014 from the Georgetown University Law Center where he was also a member of the Immigration Law Journal and the Barrister’s Council Moot Court Team. He received his Bachelor of Arts degree in International Affairs from The George Washington University in 2010.

Zach was recognized by Best Lawyers: Ones to Watch® in America for Commercial Litigation (2024).

Zach is admitted to practice in the State of New York and the United States District Courts for the Southern and Eastern Districts of New York.

Allison K. Kostecka is a partner in the Denver office of Gibson, Dunn & Crutcher. She practices in the firm’s Litigation Department, where she focuses on securities litigation, antitrust investigations and litigation, other complex commercial litigation, and data privacy. Since 2016, Allison has been recognized by Super Lawyers as a Colorado “Rising Star.” She is recognized by Best Lawyers: Ones to Watch® in America for Antitrust Law, Litigation-Antitrust, and Commercial Litigation and has been listed in the publication since 2021.

Allison represents companies in a range of complex, civil litigation matters. She has defended multiple companies in derivative lawsuits and securities class actions before federal and state courts. In addition, Allison has represented clients in a variety of antitrust and consumer protection matters before administrative bodies and federal courts. For over 10 years, she represented a large energy company in multiple federal court actions that exposed a fraudulently obtained, multi-billion dollar judgment against the company. In addition to working on extensive discovery, preliminary injunction actions, and both pre-and post-judgment motions practice related to this transnational matter, Allison was on both the trial and appellate teams for this matter.

Representative Securities Litigation and Derivative Matters:

  • Immunomedics, Inc.: Representing Immunomedics, Inc. and certain of its officers and directors in their defense of a securities class action based on alleged misstatements and omissions regarding a data integrity breach. Discovery in this matter is ongoing.
  • ViewRay, Inc.: Represented ViewRay, Inc. and certain of its officers in their defense of securities class action allegations based on statements regarding the company’s backlog. The U.S. District Court for the Northern District of Ohio granted the defendants’ motion to dismiss the putative class action complaint with prejudice.
  • Trinity Industries, Inc.: Represented Trinity Industries, Inc. and certain of its officers in their defense of securities class action allegations based on an overturned jury verdict in a False Claims Act case. This case ultimately settled.
  • Patriarch Partners and Lynn Tilton: Represented Ms. Tilton and her companies in a variety of federal and state court actions regarding ownership and control of multiple portfolio companies.
  • Thompson Creek Metals Company Inc.:Defended Thompson Creek Metals Company and its officers and directors against an individual shareholder’s lawsuit alleging securities fraud and common law claims. The U.S. District Court for the District of Colorado granted defendants’ motion for summary judgment, the Tenth Circuit affirmed, and the U.S. Supreme Court denied certiorari.
  • Molycorp, Inc.: Defended Molycorp, Inc. and its outside Board members in connection with two different securities class actions filed in federal district courts in Colorado and New York, a consolidated derivative action filed in the Delaware Court of Chancery, a consolidated derivative action filed in federal court in Colorado; and related shareholder demands. In the securities class actions, both the federal courts in Colorado and New York granted the defendants’ motions to dismiss before the actions were ultimately settled. The related Delaware derivative action was dismissed on the pleadings.
  • Gold Resources Corp.: Successfully defended Gold Resources Corp. and its directors and officers in derivative litigation and a parallel securities class action filed in the U.S. District Court for the District of Colorado. The claims in both matters arose out of alleged misrepresentations and a minor restatement of financial results. After the securities class action was dismissed on the pleadings, and the dismissal was affirmed by the Tenth Circuit, the plaintiffs voluntarily dismissed the derivative action.
  • FTV Capital: Defended individuals and FTV Capital private equity limited partners and general partner on LLC receiver’s breach of fiduciary duty claims. The case was dismissed by a Colorado state court on the defendants’ motion and the dismissal was affirmed on appeal, with review denied by Colorado Supreme Court.
  • SM Energy: Defended officers of SM Energy in a shareholder derivative action asserting claims of breach of fiduciary duty and unjust enrichment. The lawsuit, which was filed in Colorado state court, was dismissed on the pleadings and no appeal was filed.
  • Advanced Emissions Solutions, Inc.: Defended Advanced Emissions and its officers in securities class actions filed in the U.S. District Court for the District of Colorado after the company announced a restatement of its financial statements, and in related shareholder derivative lawsuits. While a motion to dismiss the securities class action was pending, the parties agreed to settle the lawsuits.

Other Representative Commercial Litigation Matters:

  • Johns Manville Corporation: Representing Johns Manville Corporation in its defense of antitrust claims brought by a competitor in the U.S. District Court for the District of Colorado. After the plaintiff’s initial complaint was dismissed on the pleadings, the plaintiff was granted leave to file an amended complaint and discovery ensued. After nearly two years of discovery, the U.S. District Court for the District of Colorado granted Johns Manville’s motion for summary judgment, and dismissed the matter in its entirety.
  • Chevron Corporation: Represented Chevron Corporation in its successful RICO suit against the purveyors of what The Wall Street Journal called the legal “fraud of the century.” Since 2010, Allison was an active member of the team pursuing claims against the U.S. lawyer who masterminded an extortion scheme against Chevron. Gibson Dunn obtained a trial verdict in favor of Chevron in 2014. Allison was a member of the Gibson Dunn team that subsequently obtained Second Circuit affirmance of that trial verdict and persuaded the U.S. Supreme Court to deny review. Allison continues to represent Chevron in post-judgment proceedings during which Chevron secured a finding of willful contempt from the U.S. District Court for the Southern District of New York against the U.S. lawyer for his violation of multiple court orders.
  • Ingram Micro: Defended Ingram Micro in three antitrust cases filed against the company, among others. The U.S. District Court for the District of Colorado granted the defendants’ motion to dismiss the antitrust claims, but allowed discovery to proceed on state law tort claims. Ingram Micro settled the claims against it in 2018.
  • Eclipse Aviation Corporation: Defended former employees of Eclipse Aviation Corporation on claims of negligent misrepresentation and alleged violations of New Mexico Unfair Practices Act in three cases in state court in New Mexico. These cases ultimately settled.

Allison is registered to practice law in the State of Colorado, as well as in the U.S. Courts of Appeal for the Sixth, Tenth, and Eleventh Circuits and the U.S. District Courts for the District of Colorado and the Northern District of Ohio.

Dana Lynn Craig is a partner in the San Francisco office of Gibson, Dunn & Crutcher and a member of the firm’s Litigation Department. Her practice focuses on leading high-stakes, complex litigation. Dana has established a reputation for her skillful handling of the most consequential e-discovery challenges our clients face. She is considered an authority at successfully guiding clients through their most complex discovery issues, sweeping across jurisdictions both national and international. Clients rely on her to effectively and efficiently navigate them through massive discovery, with Dana leading all stages of the process including setting strategy to drafting discovery motions to argument.

She further represents clients in both federal and state courts and has extensive experience at all stages of litigation, including trial work, senior case management, motion practice, depositions, witness preparation, and working with experts.  In addition, she has published on subjects ranging from arbitration to environmental topics, including cost recovery and Proposition 65.

Her representative matters include:

  • Representing leading technology firm in three-week bench trial in federal court in connection with state and federal antitrust claims. Dana led the discovery team, including crafting and implementing the strategy that successfully navigated the case through numerous high-stakes issues. She was a key member of the trial team, including leading and developing trial logistics throughout the high-profile in-person federal trial held during the global pandemic.
  • Successfully representing a health insurer and plan administrator in a four-week jury trial in state court. The jury rendered a $37.5 million verdict, ultimately awarding the full amount sought on each cause of action by the client. Dana served as second-chair for Gibson Dunn’s trial team. During that four-week span, as well as throughout trial preparation, she also worked as the managing senior associate of the team.
  • Representing major oil production company and others in a challenge to a countywide ballot initiative, in which the first phase of the case went to trial. Dana was a member of the trial team. The initiative sought to prohibit the drilling of new wells and well stimulation. It would have further imposed a sunset date for the injection or impoundment of produced water. The initiative was enjoined and the court held that two of the prongs were pre-empted by federal and state law. The client was victorious in the Court of Appeal.
  • Defending major corporation in large environmental cost recovery action in federal court against the United States. Dana was lead associate in the case and served in a senior management role over the course of her engagement on this matter. She participated in numerous depositions of federal employees and employees of government consultants. During her tenure on this matter, Dana also represented the client before the District Court Judge, Magistrate Judge, and Special Master.
  • Defending major U.S. accounting firm in state court. Dana was the lead associate for Gibson Dunn’s team on a matter in which she represented the client in state court hearings. During her engagement on the team, which has handled many similar cases for the client, she defended depositions and participated extensively in motion practice and complex e-discovery issues.
  • Defending major corporation in highly publicized trial. Dana’s work in this massive representation included preparing witnesses for trial.
  • Defending clients in both international and domestic arbitrations. Dana served in senior level roles in these matters. Her arbitration work has included conducting the direct and re-direct examination of an expert witness, motion practice, depositions, leading discovery, and preparing fact and expert witnesses. She has also published on the topic of enforcing arbitration awards in California.

Dana was named to Southern California Rising Stars by Super Lawyers  magazine in 2019, 2020, 2021, and 2022. She was also recognized by Best Lawyers: Ones to Watch® in America  for Litigation – Environmental in 2024. She also served on the Executive Committee for the Los Angeles County Bar Association Environmental Law Section. She was selected for membership in the Pacific Council on International Policy, which seeks to strengthen West Coast involvement in global affairs. She is also a member of ChIPs, which aims to further the role of women in technology, law and policy. Dana formerly served on the Young Professionals Board for CollegeSpring and, during part of her tenure, held the leadership positions of chair and co-chair on that Board.

She received her law degree from Stanford Law School in 2007, where she was co-managing editor of the Stanford Law & Policy Review  and graduated with Pro Bono Distinction. Dana earned her Bachelor of Arts from Stanford University in 2004, graduating Phi Beta Kappa with University Distinction and received interdisciplinary honors in International Security Studies. During her undergraduate career, she was The Greg Peterson Fellow and recipient of the Donald B. Marron Prize for the Most Original Historical Analysis Paper from the Center for the Study of the Presidency Fellows Program. She also interned in the offices of two U.S. Senators.

Prior to joining the firm, Dana clerked for the Honorable Barry G. Silverman of the United States Court of Appeals for the Ninth Circuit.

She is a member of the California, United States Court of Appeals for the Ninth Circuit, United States District Court for the Central District of California, United States District Court for the Northern District of California, and the United States District Court for the Southern District of California Bars.

Daniel Nowicki is a partner in the Los Angeles office of Gibson, Dunn & Crutcher, and practices in the firm’s Litigation Department. He represents clients across a variety of industries in high-stakes trial and appellate matters, and has secured victories for his clients before all levels of the federal court system—from district courts to the Supreme Court—and in numerous state courts. Daniel also served as an Assistant United States Attorney for the Central District of California, where he was lead trial counsel on various criminal matters.

Daniel has been consistently recognized by Best Lawyers in their “Ones to Watch®” guide for Criminal Defense: White-Collar since 2022.

Daniel’s representative matters include:

  • Obtained a complete victory in a contract interpretation bench trial involving claims by profit participants in the hit TV show The Walking Dead.
  • Obtained the denial of a preliminary injunction demanding that Uber stop campaign speech in support of Proposition 22, leading to the voluntary dismissal of the plaintiffs’ suit.
  • Obtained reversal of a $740 million trade secrets misappropriation verdict, in Title Source, Inc. v. HouseCanary, Inc.
  • Obtained District Court dismissal, and Ninth Circuit affirmance of the dismissal, of a putative securities fraud class action in In re Arrowhead Pharms., Inc. Sec. Litig.
  • Obtained Ninth Circuit affirmance of the dismissal of a False Claims Act action alleging $1.6 billion in damages in United States ex rel. McGrath v. Microsemi Corp.
  • Obtained dismissal of breach-of-fiduciary duty and other tort claims in an action against CBS regarding funding and distribution of the long-running daytime television show Days of Our Lives.
  • Obtained Modesto City Schools’ agreement to a groundbreaking and comprehensive settlement plan requiring the appointment of a monitor and change in policies to address racial disparities in student disciplinary action, on behalf of a group of students and community leaders.

Before joining the firm, Daniel clerked for the Honorable Diarmuid F. O’Scannlain of the United States Court of Appeals for the Ninth Circuit in Portland, Oregon.

He graduated magna cum laude from New York University School of Law in 2014 and was elected to membership in Order of the Coif. During law school, he was a Butler, Pomeroy, and Furman Scholar, and a Judge John J. Galgay fellow in Bankruptcy and Reorganization Law. Daniel interned during law school for the Honorable Judge John. G. Koeltl of the United States District Court for the Southern District of New York, and for the Honorable Judge Sean H. Lane of the United States Bankruptcy Court for the Southern District of New York. He earned a Bachelor of Arts, with high honors, from the University of California, Berkeley in 2010, where he was Battalion Commanding Officer of the Navy Reserve Officer Training Corps Battalion.

Daniel is admitted to practice law in the State of California.

Jun An Chee is an associate in the Singapore office of Gibson, Dunn & Crutcher. He is a member of the firm’s Finance Practice Group.

Jun An has experience advising both borrowers and lenders on a wide range of financing transactions, including acquisition financings, real estate financings, green and sustainability-linked financings, and capital call financings.

Prior to joining Gibson Dunn, he was an associate with a leading Singapore law firm.

Jun An received his Bachelor of Laws with Honors from the National University of Singapore in 2019. He is an Advocate and Solicitor of the Supreme Court of Singapore.

Charles Kim is a Registered Foreign Lawyer (Victoria, Australia) and an associate in the Hong Kong office of Gibson, Dunn & Crutcher. He is a member of the Finance Practice Group.

Charles has broad experience advising major financial institutions, investment funds, private equity sponsors and corporates on a wide range of financing transactions, including leveraged and acquisition financings, corporate financings, real estate financings, capital call financings and green and sustainability-linked financings. 

Prior to joining Gibson Dunn, Charles was an associate at another leading international law firm in Australia. He completed a Bachelor of Laws (Honours) and a Bachelor of Science at The Australian National University. He is admitted to practice in Australia and is a Registered Foreign Lawyer (Victoria, Australia) in Hong Kong. He is fluent in English and has working knowledge of Korean.

Charles is a member of the Young Leaders Committee of the Asia Pacific Loan Market Association.

Penny Madden is an English qualified King’s counsel and partner in the London office at Gibson, Dunn & Crutcher. She is co-chair of the International Arbitration Practice Group and a member of the firm’s Transnational Litigation Practice Group.

She has a wide range of experience in all key aspects of international arbitration with particular expertise in shareholder, telecommunications, SPA, energy, international trade and insurance disputes. She represents clients across the globe in a wide variety of arbitration proceedings, including those before the London Court of International Arbitration (LCIA), International Chamber of Commerce (ICC), United Nations Commission on International Trade Law (UNCITRAL), International Centre for Settlement of Investment Disputes (ICSID), Permanent Court of Arbitration in The Hague (PCA) Singapore International Arbitration Centre (SIAC), Hong Kong International Arbitration Centre (HKIAC) and London Maritime Arbitrators Association (LMAA), as well as in ad hoc proceedings. In addition to representing clients as counsel, Penny regularly sits as an arbitrator.

Her recent cases include representing two Middle Eastern oil and gas companies in multiple LCIA arbitrations arising out of a multi-billion oil and gas project in Kurdistan and disputed gas pipeline; representing a Middle Eastern oil and gas company in a multi-billion PCA administered arbitration against a state owned Middle East oil and gas company in a gas sales and pipe-line infrastructure project dispute; representing a telecommunications corporate in its US$17 billion dollar UNCITRAL investment treaty arbitration against a North African state for creeping expropriation and breach of the fair and equitable treatment standard; and representing shareholders in a major oil company with respect to multibillion dollar claims for expropriation under the Energy Charter Treaty against the Russian Federation.

She is a member of the LCIA, CIArb, the Financial Sector Arbitration Group and the editorial board of Commercial Dispute Resolution. She writes and lectures on a wide variety of arbitration issues and is the international arbitration specialist for the Diplomatic Book and Website for foreign Embassies and High Commissions. Penny is recognised for Public International Law, Oil & Gas and recommended as a leading individual for International Arbitration in The Legal 500 UK 2025. Chambers UK 2025, Chambers Global 2024 and Chambers Europe 2024 recommends Penny as a leading lawyer for International Arbitration, in which clients have recently noted: “she’s a superb practitioner and leader who is fully devoted to her cases. She is trusted by clients for her commercial vision and her impeccable advocacy skills”, “she has a presence in hearings which is impressive” and “Penny Madden is excellent to work with as co-counsel. She is responsive and respectful, and a pleasure to engage”. In previous years, clients have noted “she has a wonderful reputation and a wonderful commercial arbitration practice”, “she presents her case with depth and clarity” and “she is well respected”. She is described as “absolutely superb. She is no-nonsense, super smart and has excellent written advocacy skills”. She is also noted as a “strong advocate” who clients consider to be “extremely hard-working”. She is also noted as “very business-oriented” with “great analytical skills” and “always available for her clients”. Best Lawyers UK recommends Penny in the field of International Arbitration (2019-2025), she is listed as an expert in Arbitration in Who’s Who Legal 2020, and is also ranked as a ‘Litigation Star’ for International Arbitration by Benchmark Litigation Europe 2022. Penny’s team won Arbitration Team of the Year 2020 in the British Lawyer Awards for its representation of a mining investor in relation to an ICSID investment treaty arbitration against a sovereign state. She is also ranked for International Arbitration and Litigation in the Lawdragon 500 Global Litigation Lawyers guide 2021 and named by Expert Guides to its 2022 Guide to World’s Leading Women in Business Law.

Penny received her Bachelor of Arts in 1990 from University of Oxford, St. Hugh’s College, and her Law Society Finals in 1992 from University of Law, Guildford. She took silk in 2016.

Osma Hudda serves as co-partner in charge of the London office at Gibson, Dunn & Crutcher and co-chair of the London Disputes Group. She is a member of the firm’s Dispute Resolution Group.

She has broad-based dispute resolution experience including litigation and international arbitration.

Osma’s litigation experience has involved representing clients in Employment Tribunals, the High Court, Court of Appeal and Supreme Court. In arbitration she has represented clients from a wide variety of industries, including construction and oil & gas, before arbitral tribunals including the ICC and LCIA.

Osma has been named in The Lawyer’s Hot 100 2016 list featuring “the best lawyers in the business – the cream of the crop from in-house, private practice and the Bar.” She is also recognised in the 2016 Legal Week Rising Stars in Litigation list, which profiles the up-and-coming litigation stars at UK top 50 and top international firms in London. Osma is recognised in The Legal 500 UK 2023 for International Arbitration and Commercial Litigation, in which clients note “Osma Hudda has both the intellectual clout to have a clear view of how the complex legal and factual issues feed into the litigation strategy, and the strong leadership and interpersonal skills needed to motivate the legal team and work closely with counsel, the client and witnesses in order to deliver that strategy – all with a keen eye on the client’s commercial interests as well.” Osma is also recognised in The Legal 500 UK 2025, which has previously remarked that Osma is “a very skilled, focused, organised lawyer, with a strong eye for both the big picture and detail”, for Commercial Litigation, Banking Litigation: Investment and Retail, International Arbitration and Public International Law. She is also ranked for International Arbitration and Litigation in the Lawdragon 500 Global Litigation Lawyers guide 2021.

She was admitted as a Solicitor of the Senior Courts of England and Wales in 2004.

Beau Stark is a partner in Gibson, Dunn & Crutcher’s Denver office. He has broad experience in all aspects of corporate practice, including public and private mergers and acquisitions, joint ventures, public offerings, capital markets transactions, securities offerings, management participation and financing, tender offers, private fund formation and general corporate matters.

Mr. Stark is ranked as a leading corporate lawyer (Band 1) by Chambers USA: America’s Leading Lawyers for Business in Colorado Corporate/M&A and Colorado Natural Resources & Energy. Mr. Stark has been repeatedly recognized in the Denver Business Journal’s list of Who’s Who in Energy. He has been listed in The Best Lawyers in America® every year since 2013 for Corporate Governance Law, Mergers and Acquisitions Law, and Securities Regulation. Mr. Stark was named the 2017 and 2019 Lawyer of the Year for Corporate Governance, Denver, 2018 , 2021 and 2024 Lawyer of the Year for Mergers and Acquisitions, Denver. Mr. Stark was also featured in Legal 500’s 2024 M&A Powerlist.

Mr. Stark graduated from the University of Colorado School Of Law, where he was a member of the Order of the Coif and was an Editor on the University of Colorado Law Review. He received a Bachelor of Science degree in aerospace engineering from the University of Colorado at Boulder in 1991.

Mr. Stark is a frequent lecturer on private equity and mergers and acquisitions topics, and author of prior publications on limited liability companies. Mr. Stark is also past Chairman of the Board for the Make-A-Wish Foundation of Colorado.