Clients turn to William Isasi to advise them in all aspects of antidumping and countervailing duty proceedings and World Trade Organization (WTO) litigation.

With more than 20 years’ experience as an international trade lawyer, William has secured low antidumping and countervailing duty tariffs for his clients and regularly advises clients in all aspects of these trade remedy proceedings and customs matters including:

representing producers and exporters outside the United States and U.S. importers in antidumping and countervailing duty investigations before the U.S. Department of Commerce;
litigating antidumping and countervailing duty determinations before the U.S. Court of Appeals for the Federal Circuit, the U.S. Court of International Trade, the WTO Appellate Body and panels, and binational panels under the North American Free Trade Agreement;
advising U.S. companies on the viability of petitioning for antidumping or countervailing duty orders;
achieving effective customs compliance with antidumping and countervailing duty orders; and
developing effective business strategies to adapt to potential tariff risks.

William has represented clients in a wide variety of industries including: aerospace, consumer products, chemical and agrochemical, steel, oil and gas, paper, and ball bearings.

He joined the firm after serving as an Assistant Chief Counsel at the U.S. Department of Commerce, Office of the Chief Counsel for Trade Enforcement & Compliance. In that role, he provided extensive legal advice on trade enforcement to the Assistant Secretary for Enforcement & Compliance, Deputy Assistant Secretaries, and other Department officials.