333 South Grand Avenue, Los Angeles, CA 90071-3197 USA
Sean S. Twomey is a litigation associate in the Los Angeles office of Gibson, Dunn & Crutcher LLP. His practice focuses on complex commercial cases, appellate law, sports law, and health care compliance, enforcement, and litigation. Mr. Twomey has represented clients in the pharmaceutical, health care, defense, athletic apparel, and sports marketing industries, including Nike, Allergan, Lockheed Martin, Microsemi, and the Gatorade Company in contract disputes, securities litigation, and business tort, patent, trade secret, and unfair competition matters.
Mr. Twomey’s experience also includes advising clients regarding high-profile athlete endorsement contract negotiations. In addition, he has experience handling internal investigations, compliance audits, False Claims Act qui tam litigation, and civil and criminal investigations and enforcement actions relating to export controls, off-label promotion, anti-kickback issues, and drug and device advertising, design, and safety issues.
Representative Matters Include:
In addition, Mr. Twomey frequently practices before both the United States Court of Appeals for Veterans Claims and the United States Department of Veterans Affairs, representing U.S. veterans on a pro bono basis in claims for service-connected medical benefits. Mr. Twomey also supervises law students handling veteran’s benefits appeals through pro bono programs at the University of California at Irvine School of Law and the University of Virginia School of Law.
Mr. Twomey was recognized in The Best Lawyers in America® 2022 Ones to Watch in Entertainment and Sports Law.
Mr. Twomey graduated Order of the Coif from the University of Virginia School of Law, where he was also awarded the Paul A. Simon Memorial Scholarship and the Pro Bono Service Award. In law school, Mr. Twomey served as Executive Editor of the Virginia Journal of Law & Social Policy. He graduated summa cum laude from the University of California at Los Angeles in 2007, with a Bachelor of Arts degree in Philosophy.
Mr. Twomey is a member of the bars of the State of California, the District of Columbia, and the State of New York. He is also admitted to practice before the United States Courts of Appeals for the Ninth Circuit and Federal Circuit, and the United States District Courts for the Central, Northern, and Southern Districts of California.
University of Virginia - 2011 Juris Doctor
University of California - Los Angeles - 2007 Bachelor of Arts
District of Columbia Bar
New York Bar