Leadership

Breadcrumb

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.

Front Office

 
Chief of Staff — Sam Mulopulos
 
Deputy Chief of Staff — Zoe Sophos
 
Senior Advisor — Sam Scales
 
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
 
Special Assistant — Tony Crnkovich
 
Special Assistant — Aidan Doud

 

Office of the General Counsel

 

General Counsel — Jennifer Thornton
 
Adviser to the General Counsel — Kwan Kim

 

Office of Congressional Affairs

 
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

 

Office of Intergovernmental Affairs and Public Engagement

 
Assistant U.S. Trade Representative for Intergovernmental Affairs and Public Engagement — Jennifer Bang
 
Director for Intergovernmental Affairs and Public Engagement — Marshall Stallings
 
Director for Intergovernmental Affairs and Public Engagement — Lauren Baldwin

 

Office of Public and Media Affairs 

 
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 Representatives and Other Senior Officials

 

Assistant U.S. Trade Representative for Economic Affairs — Laurie-Ann Agama
 
Assistant U.S. Trade Representative for Administration — Fred Ames
 
Assistant U.S. Trade Representative and Deputy Chief of Mission, Geneva — David Bisbee
 
Assistant U.S. Trade Representative for Agricultural Affairs and Commodity Policy — Julie Callahan
 
Assistant U.S. Trade Representative for Small Business, Market Access, and Industrial Competitiveness — Sushan Demirjian
 
Assistant U.S. Trade Representative for Southeast Asia and the Pacific — Sarah Ellerman
 
Acting Assistant U.S. Trade Representative for Japan, Korea, and APEC Affairs — Scott Pietan
 
Assistant U.S. Trade Representative for Africa — Constance Hamilton
 
Assistant U.S. Trade Representative for Innovation and Intellectual Property — Daniel Lee
 
Assistant U.S. Trade Representative for South and Central Asia — Brendan Lynch
 
Assistant U.S. Trade Representative for Labor Affairs — Katy Mastman
 
Assistant U.S. Trade Representative for China, Mongolia and Taiwan Affairs — Terrence J. McCartin
 
Assistant U.S. Trade Representative for Environment and Natural Resources — Kelly Milton
 
Assistant U.S. Trade Representative for WTO and Multilateral Affairs — Neil Beck
 
Assistant U.S. Trade Representative for Services and Investment — Kenneth Schagrin
 
Assistant U.S. Trade Representative for Europe and the Middle East — Bryant Trick
 
Assistant U.S. Trade Representative for the Western Hemisphere — Daniel Watson 
 
Deputy General Counsel for Monitoring and EnforcementJuan Millán
 
Director of the Interagency Center for Trade Implementation, Monitoring, and Enforcement — Rachel Howe