Michele Jeanne Sison is an American diplomat and career member of the Senior Foreign Service serving 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 origin serving 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. He was President Donald Trump's nominee to become United States Ambassador to Colombia. This nomination was reported favorably by the Senate Committee on Foreign Relations in May 2018, but was returned to the President at the close of the 115th Congress without consideration by the full Senate. In May 2019, it was announced that Philip Goldberg would replace Macmanus as nominee to be the next United States Ambassador to Colombia.
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 has served as the United States ambassador to Angola and the United States ambassador to São Tomé and Príncipe since 2022. 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.
Richard Merrill Mills Jr. is an American diplomat who serves as the United States deputy ambassador to the United Nations. He served as the U.S. Chargé d'Affaires and Acting Permanent Representative to the United Nations between January 20, 2021, and February 24, 2021, when Linda Thomas-Greenfield became ambassador. In July 2022, he was announced as the nominee to serve as the United States ambassador to Nigeria.
Todd Crawford Chapman is an American career diplomat who has served as the United States Ambassador to Brazil and the United States Ambassador to Ecuador.
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 is the current nominee to be the next US Ambassador to Liberia.
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.
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 the nominee to be the next US ambassador to Lebanon. She previously served as the US ambassador to Namibia.
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 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 serving as the United States ambassador to Yemen since 2022.
Timmy T. Davis is an American diplomat and former Marine who is the United States ambassador to Qatar.
