William Busis is a Deputy Assistant United States Trade Representative for Monitoring and Enforcement in the Office of General Counsel at USTR. He is responsible for supervising the monitoring and enforcement of U.S. trading partners’ compliance with obligations under the WTO Agreement and regional and bilateral trade agreements. His work involves litigation in formal dispute settlement proceedings brought by the United States, the defense of U.S. measures in disputes brought by trading partners, and U.S. third-party participation in disputes between other countries. Mr. Busis has been a member of the USTR Office of General Counsel since 1996, and has covered a wide variety of matters involving both litigation and the negotiation of trade agreements.

Prior to joining USTR, Mr. Busis practiced in the areas of general litigation and international trade litigation at the law firm of Arnold & Porter. Mr. Busis received his J.D. from Harvard Law School, where he was a member of the editorial board of the Harvard Law Review. After law school, Mr. Busis clerked for Chief Judge Levin Campbell of the United States Court of Appeals for the First Circuit. Mr. Busis received a B.A. in physics from Yale University.