Jamieson Greer is the current United States Trade Representative, confirmed in February 2025. He previously served as Chief of Staff to the USTR during the first Trump administration (2017-2020), where he was instrumental in high-level trade negotiations. His responsibilities included implementing tariffs on Chinese goods and negotiating the US-China Phase One trade agreement. Greer also played a critical role in securing the United States-Mexico-Canada Agreement (USMCA). With a background as an international trade lawyer and former US Air Force officer, his expertise lies in combating unfair trade practices, defending American industries and expanding export markets.