Jeffery B. Denning

Partner / Washington

Jeffery Denning’s practice is focused on international trade compliance and enforcement matters before the U.S. Department of Commerce and U.S. International Trade Commission, including antidumping and countervailing duty proceedings, and Section 232 proceedings as well as circumvention matters before U.S. Customs and Border Protection. Mr. Denning has extensive experience litigating trade matters before the U.S. Court Of Appeals for the Federal Circuit and the U.S. Court of International Trade.

Mr. Denning has successfully represented U.S. producers of primary metals, processed steel (including plate, coil and pipe products), appliances, plastic and woven plastic packaging, and furniture products in trade remedy actions involving imports from China, Japan, Korea, Mexico and Vietnam. Mr. Denning has also represented foreign producers of steel, agricultural, apparel, large machinery, and memory products in U.S. enforcement proceedings. Prior to joining Cassidy Levy Kent, Mr. Denning practiced for over a decade in the Washington international trade group of a large U.S. law firm.

Government Service

Before entering private practice, Mr. Denning served at the U.S. Department of Commerce in the Office of Antidumping Duty Investigations, International Trade Administration, and in the Office of the General Counsel, Chief Counsel for Import Administration. While serving in the International Trade Administration, Mr. Denning was on the team that drafted the antidumping duty provisions of the Uruguay Round Agreements Act and the accompanying Statement of Administrative Action. Mr. Denning was also lead case analyst on antidumping investigations involving steel and aramid fiber products. This position involved extensive travel to foreign producers’ production and sales facilities for purpose of verifying information submissions.  While an attorney in the Chief Counsel’s office, Mr. Denning provided legal assistance to Import Administration officials conducting antidumping and countervailing duty proceedings and to Department of Justice officials handling judicial appeals of agency determinations.


  • Congressional Action Allowing Commerce to Retroactively Apply the Subsidy Law to Exports from China Survives a Constitutional Challenge, King & Spalding Trade & Manufacturing Alert (April 2015)
  • Downturn in Chinese Economy May Be Triggering An Export Surge, King & Spalding Trade & Manufacturing Alert (April 2014)
  • Manufacturing In The United States Is Increasingly Cost-Competitive, King & Spalding Trade & Manufacturing Alert (October 2013)
  • Commerce Takes A More Aggressive Stance On Fraud, King & Spalding Trade & Manufacturing Alert (April 2013)
  • U.S. Importers Face Jail Time And Massive Fines For Illegally Avoiding Antidumping Duties, King & Spalding Trade & Manufacturing Alert (April 2011)
  • International Trade Bar And Federal Circuit Confirm Tough Stance On Fraud In Trade Remedy Proceedings, King & Spalding Trade & Manufacturing Alert (March 2011)


  • J.D., Case Western Reserve University, College of Law
  • B.S., Old Dominion University (Geology)

Bar Memberships

  • District of Columbia
  • New York
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of International Trade