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 USTR for Congressional Affairs — Brett Doyle
Deputy Assistant USTR for Congressional Affairs — Larry Calhoun
Senior Director for Congressional Affairs — Duncan Braid
Director for Congressional Affairs — Keyden Smith-Herold
Deputy Assistant USTR for Public and Media Affairs — Kate Lair
Director for Public and Media Affairs — Madeline Yarbrough
Director for Intergovernmental Affairs and Public Engagement — Marshall Stallings
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
AUSTR for Trade Policy Coordination (Acting) — Matthew Jaffe
AUSTR for Innovation and Intellectual Property — Daniel Lee
AUSTR for South and Central Asia — Brendan Lynch
AUSTR for Labor Affairs — Katy Mastman
AUSTR for China, Mongolia and Taiwan Affairs — Terrence J. McCartin
AUSTR for Environment and Natural Resources — Kelly Milton
AUSTR for WTO and Multilateral Affairs (Acting) — Kate Psillos
AUSTR for Services and Investment — Kenneth Schagrin
AUSTR for Europe and the Middle East — Bryant Trick
