2000 K Street NW, 4th Fl
Washington, DC 20006

202 775 4500


Practice area:


Ariel N. Lavinbuk is a trial and appellate litigator. He has a broad commercial practice, with substantial experience in matters involving corporate governance, debtor-creditor and fraudulent-transfer law, and intellectual property licensing and litigation.

Ariel has argued or briefed cases in federal and state trial courts nationwide, in bankruptcy courts, and in nearly every federal court of appeals. His Supreme Court experience includes merits-stage briefing in more than a dozen cases and petition-stage briefing in many more. Ariel also has extensive expertise litigating international disputes in U.S. courts, frequently works with and coordinates foreign counsel prosecuting actions abroad, and has provided expert testimony on U.S. law in foreign judicial proceedings.

In addition to his litigation portfolio, Ariel regularly represents and advises clients in negotiations involving trade secrets, patents, trademarks, and confidential and proprietary information. As lead counsel, he has successfully negotiated deals concerning the ownership and funding of technology startups and he regularly advises website and application developers on Terms of Use, data privacy, and other compliance-related issues.

Ariel also counsels clients on matters related to government ethics, holds a Top Secret/SCI security clearance, and has represented foreign and U.S. elected officials, their staff, and lobbyists in civil and criminal actions and congressional investigations.

Ariel began his career at McKinsey & Co., where he advised technology and media companies on a wide variety of strategic and organizational issues. He also spent time on the management staff of Teach For America, where he placed nearly 2,000 teachers in over twenty school districts nationwide and disbursed millions of dollars in financial aid.

Ariel clerked for Judge Stephen F. Williams on the United States Court of Appeals for the D.C. Circuit. He is widely published, with works appearing in the Harvard Law Review, the Yale Law Journal, and Slate, among other publications. He is also a fellow and founding board member of the Truman National Security Project, and is a frequent panelist at Georgetown Law School’s Supreme Court Institute.

Last updated July 2019