Hewitt heads Hunton & Williams' Global Competition Practice Group. His practice includes all aspects of competition law counseling and litigation including antitrust, business torts, and intellectual property. Before joining Hunton & Williams, Hewitt was DOJ Assistant Attorney General in charge of over 700 employees at the Antitrust Division and all aspects of the Division's criminal and civil merger and non merger enforcement program. He successfully argued a landmark case limiting U.S. court jurisdiction over anticompetitive acts committed outside U.S. markets (F. Hoffman-LaRoche Ltd. v. Empagran S.A., 542 U.S. 155 (2004). He served as chair of the OECD Competition Committee Working Party 3 on international enforcement, and led the adoption of guidelines for international information sharing in cartel cases. He led the first U.S. delegation since the 1980's to visit the People's Republic of China for competition law discussions. Before joining DOJ, Hewitt was appellate counsel for finders of the largest sunken treasure ever recovered (Columbus-America Discovery Group v. Atlantic Mutual Insurance Co., 203 F.3d 291 (4th Cir. 2000). He served as law clerk to U.S. Supreme Court Justices Anthony M. Kennedy from 1989-90 and Lewis F. Powell, Jr. from 1988-89, as well as clerking for Hon. J. Harvie Wilkinson III of the Fourth Circuit Court of Appeals from 1987-88.