Jamieson Greer

Jamieson Lee Greer (born August 16, 1980) is an American trade attorney and former Air Force officer who has served as the United States trade representative since February 2025. Greer has additionally served as the acting special counsel of the United States since March 2025. He served as the acting director of the United States Office of Government Ethics from March to August 2025.

Greer attended Brigham Young University, where he was a Mormon missionary. After graduating with a bachelor's degree in international studies, he obtained a joint master's degree in global business law from Sciences Po and Paris 1 Panthéon-Sorbonne University, as well as a Juris Doctor from the University of Virginia School of Law. Greer served in the United States Air Force Judge Advocate General's Corps and was the chief of military justice at Joint Base Balad in Iraq. After Greer's military service, Robert Lighthizer hired him at Skadden, Arps, Slate, Meagher & Flom in 2012. Greer worked in trade law for the firm and later for Kirkland & Ellis.

In June 2017, Lighthizer, the United States trade representative, hired Greer as his chief of staff. Greer worked with Lighthizer on several trade policies within the Trump administration, including initiating a trade war with China and signing the United States–Mexico–Canada Agreement. He represented the United States on Lighthizer's behalf in various events. Greer resigned from his position in May 2020 to work in private practice, becoming a partner at King & Spalding. In November 2024, President-elect Donald Trump named Greer as his nominee for United States trade representative. Greer appeared before the Senate Committee on Finance in February 2025, and he was confirmed by the Senate that month. Greer has been described as an "architect" of Trump's tariff policy by The New York Times.