The assistant secretary of state for international organization affairs is the head of the Bureau of International Organization Affairs within the United States Department of State that creates and executes policy in international organizations such as the United Nations. The U.S. Department of State created the position of Assistant Secretary of State for United Nations Affairs in February 1949, using one of the six assistant secretary positions originally authorized by Congress in 1944. On August 25, 1954, a Department administrative action changed the incumbent's designation to Assistant Secretary of State for International Organization Affairs.
List of assistant secretaries of state for international organization affairs #OfficeholderTerm startedTerm ended1Dean RuskFeb 9, 1949May 26, 19492John D. Hickerson Aug 8, 1949Jul 27, 19533Robert D. MurphyJul 28, 1953Nov 30, 19534David McK. KeyDec 18, 1953Jul 31, 19555Francis O. WilcoxSep 6, 1955Jan 20, 19616Harlan Cleveland Feb 23, 1961Sep 8, 19657Joseph John Sisco Sep 10, 1965Feb 9, 19698Samuel De PalmaFeb 11, 1969Jun 20, 19739David H. PopperJun 25, 1973Jan 2, 197410William B. Buffum Feb 4, 1974Dec 18, 197511Samuel W. LewisDec 24, 1975Apr 13, 197712Charles W. Maynes Apr 14, 1977Apr 9, 198013Richard Lee McCall, Jr.Jun 10, 1980Jan 21, 198114Elliott Abrams May 13, 1981Dec 1, 198115Gregory J. Newell Jun 4, 1982Nov 12, 198516Alan L. Keyes Nov 13, 1985Nov 17, 198717Richard S. WilliamsonFeb 18, 1988Mar 19, 198918John R. Bolton May 22, 1989Jan 19, 199319Douglas J. Bennet, Jr. May 26, 1993May 31, 199520Princeton N. LymanMar 19, 1997Oct 22, 199821C. David Welch Oct 23, 1998Nov 19, 200222Kim HolmesNovember 21, 2002May 1, 200523Kristen SilverbergAugust 16, 2005June 27, 200824Brian H. HookOctober 3, 2008January 20, 200925Esther BrimmerApril 6, 2009September 5, 201326Bathsheba N. CrockerSeptember 19, 2014January 20, 2017 -Tracey Ann Jacobson (acting)January 20, 2017October 2017 -Mary Catherine Phee (acting)December 12, 2017March 28, 2018 27Kevin MoleyMarch 28, 2018November 29, 2019 -Jonathan M. Moore (acting)November 29, 2019March 1, 2020 -Pamela D. Pryor (initially acting, later as Senior Bureau Official)March 2, 2020January 20, 2021 -Erica J. Barks-Ruggles (Senior Bureau Official)January 20, 2021December 21, 202128Michele J. SisonDecember 21, 2021January 20, 2025 -McCoy Pitt (Senior Bureau Official)January 20, 2025Incumbent
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