The GATT Board
Zachary Simmons is a Senior Associate at Steptoe & Johnson LLP, where he focuses his practice on antidumping (AD) and countervailing duty (CVD) investigations and reviews before the US Department of Commerce (DOC) and the US International Trade Commission (ITC) and related litigation before the US Court of International Trade (CIT) and the US Court of Appeals for the Federal Circuit (CAFC). Zachary also counsels clients on a range of trade policy and customs compliance matters.
Prior to joining Steptoe, Zachary served in the Office of the Chief Counsel for Trade Enforcement and Compliance at the DOC, where he advised the agency on numerous AD/CVD investigations and reviews and served as agency counsel in litigation before the CIT, CAFC, and World Trade Organization (WTO). Prior to his tenure at DOC, he was a Fellow in the Office of General Counsel at the Office of the United States Trade Representative. In that capacity, Zachary worked on a variety of matters related to trade policy and legislation as well as WTO dispute settlement proceedings.
Zachary has served as Chairman of GATT DC since 2018.
Director of Communications
Adam M. Sulewski serves as the U.S. Customs and Border Protection Trade Representative to Mexico, and works at the U.S. Embassy – Mexico City. In this role, he represents U.S. Customs and Border Protection to the Government of Mexico, the Mexican private sector, and coordinates U.S. Customs and Border Protection’s engagement in country with the U.S. Embassy community.
Mr. Sulewski began service with U.S. Customs and Border Protection in 2010, and has served in several trade-focused portfolios, including trade agreements and special trade legislation, antidumping and counterveiling duties, international engagement, congressional affairs, employee training, and trade stakeholder engagement. Recently, Mr. Sulewski served as Branch Chief for CBP’s U.S. – Mexico – Canada Agreement (USMCA) Center, leading CBP’s comprehensive, consistent, and transparent implementation of the USMCA. Mr. Sulewski is a Presidential Management Fellowship alumni, and has been recognized with the CBP Commissioner’s Award, the World Customs Organization Certificate of Merit, and the State Department’s Superior Honor Award. Mr. Sulewski attended Suffolk University Law School (J.D., ’09), and is licensed to practice law in New York and Massachusetts. He is married to Bruce A. Herr, Jr., a certified registered nurse anesthetist, and lives in Mexico City and in Washington, D.C.
Director of Event Planning
Tung Nguyen is an attorney in the international trade group at Baker Hostetler.
His practice focuses on trade remedies litigation, customs compliance, and trade policy. He also advises clients on export controls and government contact issues.
Tung enjoys ping pong, biking and outdoor activities. He lives in NE DC with his husband Alex and their cat, Moon.