Patrick McLain's practice focuses on international economic regulation and trade policy, with a focus on WTO litigation and market access counseling; antidumping and countervailing duty proceedings before the US Department of Commerce, International Trade Commission and federal courts; and export control matters. Recent representations include the WTO disputes between the United States and European Union concerning large civil aircraft, as well as trade litigation and counseling involving the automobile, chemical, information technology, telecommunications and wooden furniture industries. A significant portion of Mr. McLain's practice relates to inbound and outbound trade with China.

Prior to joining the firm, Mr. McLain clerked for the Hon. Jane A. Restani, Chief Judge of the United States Court of International Trade. In addition to serving the chief judge on a variety of trade remedies and customs cases before the Court of International Trade, he supported her work as a visiting judge with the US Courts of Appeals for the First, Third, Sixth, Ninth and Eleventh Circuits, as well as the US District Court for the District of Columbia.