Leadership

United States Trade Representative — Jamieson Greer

Ambassador Jamieson Greer was confirmed by the U.S. Senate as the 20th United States Trade Representative on February 27, 2025. As a key member of President Trump’s cabinet, Ambassador Greer has made it a priority to put America First on trade by combating unfair foreign trade practices, expanding market access for Made in America products, and ensuring the United States has balance and reciprocity in its trading relationships.

Ambassador Greer returns to USTR after previously serving as Chief of Staff to Ambassador Robert Lighthizer during President Trump’s first term. In that role, he was deeply involved in the Administration’s implementation of tariffs on China and subsequent negotiation of the U.S.-China Phase One Agreement. He also was a critical part of USTR’s efforts to negotiate, and obtain congressional approval for, the U.S.-Mexico-Canada Agreement (USMCA).

Outside of government service, Ambassador Greer was a partner at a Washington law firm where his practice focused on international trade and national security issues. Earlier in his career, Ambassador Greer served in the U.S. Air Force Judge Advocate General’s Corps, including a deployment to Iraq.

He received his J.D. from the University of Virginia School of Law and a joint Master in Global Business Law from l’Institut d’Etudes Politiques de Paris (Sciences Po) and l’Université de Paris I Panthéon-Sorbonne. He graduated with a B.A. in International Studies from Brigham Young University.

Chief of Staff — Sam Mulopulos

Deputy Chief of Staff — Zoe Sophos

Senior Advisor — Sam Scales

General Counsel — Jennifer Thornton

Adviser to the General Counsel — Kwan Kim

Senior Director for Policy — Joe Sullivan

Senior Director for Policy — Tia Potskhverashvili

Executive Secretary — Michael Starr

Director of Operations and Protocol — Kimberly Morrall

Deputy Director of Scheduling — Rosalyn Hollingsworth

Assistant U.S. Trade Representative for Congressional Affairs — Brett Doyle

Deputy Assistant U.S. Trade Representative for Congressional Affairs — Larry Calhoun

Senior Director for Congressional Affairs — Duncan Braid

Director for Congressional Affairs — Keyden Smith-Herold

Deputy Assistant U.S. Trade Representative for Public and Media Affairs — Kate Lair

Director for Public and Media Affairs — Madeline Yarbrough

Assistant U.S. Trade Representative for IGA and Public Engagement — Jennifer Bang

Director for Intergovernmental Affairs and Public Engagement — Marshall Stallings

Director for Intergovernmental Affairs and Public Engagement — Lauren Baldwin

Special Assistant — Tony Crnkovich

Special Assistant — Aidan Doud

Assistant U.S. Trade Representatives and Other Senior Officials

Deputy General Counsel for Monitoring and Enforcement — Juan Millán

AUSTR for Economic Affairs — Laurie-Ann Agama

AUSTR for Administration — Fred Ames

AUSTR and Deputy Chief of Mission, Geneva — David Bisbee

AUSTR for Agricultural Affairs and Commodity Policy — Julie Callahan

AUSTR for Small Business, Market Access, and Industrial Competitiveness — Sushan Demirjian

AUSTR for Southeast Asia and the Pacific — Sarah Ellerman

AUSTR Japan, Korea, and APEC Affairs (Acting) — Deanne de Lima

AUSTR for Africa — Constance Hamilton

Director, Interagency Center for Trade Implementation, Monitoring and Enforcement — Rachel Howe