Casey Kyung-Se Lee is an associate in the New York office of Gibson, Dunn & Crutcher, where he is a member of the Firm’s Litigation, Appellate and Constitutional Law, White Collar Defenses and Investigations, Intellectual Property, and Media, Entertainment and Technology Practice Groups.  Mr. Lee’s practice focuses on representing clients in litigation and investigations involving the federal government, and in complex commercial disputes across a broad range of industries and practice areas.

Mr. Lee rejoined Gibson Dunn in 2020 after serving as an Assistant United States Attorney in the Civil Division of the U.S. Attorney’s Office for the Southern District of New York, where he investigated allegations of fraud against the United States under the False Claims Act, Anti-Kickback Statute, and other statutes.  Mr. Lee also represented federal agencies and officers in a wide variety of affirmative and defensive matters, including cases involving constitutional law, the Administrative Procedure Act, bankruptcy, employment discrimination, the Freedom of Information Act, and trademark law.

Mr. Lee earned his Juris Doctor in 2010 from the University of Virginia School of Law, where he was elected to the Order of the Coif.  At Virginia, Mr. Lee was an Articles Editor for the Virginia Law Review, a semifinalist in the 81st William Minor Lile Moot Court Competition, and a member of the Supreme Court Litigation Clinic.  Following his graduation from law school, Mr. Lee served as a law clerk to the Honorable Debra Ann Livingston of the United States Court of Appeals for the Second Circuit, and was a litigation associate at Cravath, Swaine & Moore.

Prior to law school, Mr. Lee was a Marketing Manager for DrJays.com, a leading online retailer of branded, urban fashion apparel, and an Assistant Program Manager for the Danbury Mint.  Mr. Lee graduated cum laude from Yale College in 2004 with a Bachelor of Arts degree in Ethics, Politics, and Economics.

Mr. Lee is admitted to practice in the State of New York, as well as before the United States District Court for the Southern District of New York and the United States Court of Appeals for the Second Circuit.