Michele Jeanne Sison is an American diplomat and career member of the Senior Foreign Service who had served as the assistant secretary of state for international organization affairs. She has previously served in various other diplomatic posts around the world on behalf of the United States, including ambassador to Haiti. Sison holds the personal rank of career ambassador.
Mark Boulware is an American diplomat who served as the United States Ambassador to Chad from 2010 to 2013. He also served as the United States Ambassador to the Islamic Republic of Mauritania from 2007 until 2010.
Sung Yong Kim is an American diplomat of Korean descent who has served as the United States Special Representative for North Korea Policy since 2021, and previously from 2014 to 2016. He has also served as the acting Assistant Secretary of State for East Asian and Pacific Affairs from January to June 2021.
Joseph Estey Macmanus is an American diplomat who served as Executive Secretary of the United States Department of State from 2014 to 2017. Prior to that, he served as the U.S. Ambassador to International Organizations in Vienna from 2012 to 2014, as well as interim coordinator for efforts to implement President Barack Obama's Iran Nuclear Deal in 2015.
Matthew Heywood Tueller is an American diplomat who formerly served as the United States Ambassador to Iraq. A career United States Foreign Service officer, he served as the United States Ambassador to Kuwait and Yemen as well.
Tulinabo Salama Mushingi is an American diplomat who served as the United States ambassador to Angola and the United States ambassador to São Tomé and Príncipe from 2022 to 2024. He previously served as the United States ambassador to Burkina Faso from 2013 to 2016, and a joint appointment as United States ambassador to Senegal and United States ambassador to Guinea-Bissau from 2017 to 2022. He also served in the executive offices of Secretaries of State John F. Kerry and Hillary Clinton.
Todd Crawford Chapman is an American career diplomat who has served as the United States ambassador to Brazil from 2020 to 2021 and as the United States ambassador to Ecuador from 2016 to 2019.
Lucy Tamlyn is an American diplomat who has served as the United States ambassador to the Democratic Republic of the Congo since February 2023. She previously served as chargé d'affaires to Sudan ; as United States ambassador to the Central African Republic ; and as United States ambassador to Benin.
Mark Christopher Toner is a U.S. Foreign Service officer and former Spokesperson for the United States Department of State. He has served as the United States ambassador to Liberia since 2024.
Michael Arthur Raynor is an American Foreign Service Officer specializing in relations with Africa who has served as the United States ambassador to Senegal and the United States ambassador to Guinea-Bissau since 2022. He was the United States ambassador to Ethiopia until January 2021. He previously served as the Director of the Office of Career Development and Assignments in the Bureau of Human Resources of the United States Department of State. Raynor served as United States Ambassador to Benin from 2012 to 2015 after being nominated by President Barack Obama and confirmed by the U.S. Senate. Prior to his post in Benin, he was deputy executive director and then executive director of the Bureau of African Affairs.
David Dale Reimer is an American diplomat and member of the Senior Foreign Service. He had served as the United States ambassador to Sierra Leone from 2021 to 2023. He previously served concurrently as the United States ambassador to Mauritius and United States ambassador to Seychelles from 2018 to 2021. He has also served as Chargé d'affaires ad interim to Burundi and Chargé d'Affaires ad interim to Mauritania.
Eric Paul Whitaker is an American diplomat and career member of the Senior Foreign Service who served as the United States Ambassador to Niger from 2018 to 2021. He was sworn in on December 15, 2017 and presented his credentials to President Mahamadou Issoufou on January 26, 2018. He left office in December 1, 2021.
Lisa Anne Johnson is an American diplomat who is serving as the United States ambassador to Lebanon. She previously served as the United States ambassador to Namibia from 2018 to 2021.
Donald L. Heflin is an American diplomat who served as the United States Ambassador to Cape Verde from 2015 to 2018.
Robert Stuart Gilchrist is an American diplomat who had served as the principal deputy assistant secretary of state for democracy, human rights, and labor from September 2023 to August 2024. He served as the United States ambassador to Lithuania from February 2020 to August 2023. He is a career Foreign Service Officer with the rank of minister counselor. He was appointed by President Donald Trump and confirmed by the United States Senate on December 20, 2019. Gilchrist was the fifth US ambassador from the LGBT community nominated to serve by the Trump administration.
Steven Christopher Koutsis is an American diplomat who served as the Chargé d’Affaires of Guinea between 2020 and 2022. He was a former nominee to be the United States Ambassador to Chad.
David R. Gilmour is an American diplomat who is serving as the United States Ambassador to Equatorial Guinea since 2022.
Steven H. Fagin is an American diplomat who has served as the United States ambassador to Yemen since 2022.
Timmy T. Davis is an American diplomat and retired Marine who is the United States ambassador to Qatar.
