Assistant Secretary of State for International Security and Nonproliferation

United States
Assistant Secretary of State
for International Security and Nonproliferation
Seal of the United States Department of State
Flag of an Assistant Secretary of State
since March 31, 2022
Reports toUnder Secretary of State for Arms Control and International Security Affairs
NominatorPresident of the United States
Inaugural holderStephen Rademaker (acting)
Formation2005
Websitewww.state.gov/t/isn/index.htm

The Assistant Secretary of State for International Security and Nonproliferation is the head of the Bureau of International Security and Nonproliferation, which is responsible for managing the nonproliferation, counter-proliferation functions of the United States Department of State. The position was created on September 13, 2005, when the Bureau of Arms Control and the Bureau of Nonproliferation were merged. The Assistant Secretary of State for International Security and Nonproliferation reports to the Under Secretary of State for Arms Control and International Security Affairs.

Stephen Rademaker was the first Acting Assistant Secretary of State for International Security and Nonproliferation. He had been the Assistant Secretary for the Bureau of Arms Control, and in February 2005 he was named the head of the Bureau for Nonproliferation pending the two bureaus' merger.

Assistant Secretaries of State for International Security and Nonproliferation

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# Name Assumed office Left office President(s) served under
- Stephen G. Rademaker (acting) September 13, 2005 May 20, 2006 George W. Bush
- Francis C. Record (acting) May 21, 2006 October 1, 2006
1 John Rood October 2, 2006 September 27, 2007
- Patricia A. McNerney (acting) September 28, 2007 January 20, 2009
- C.S. Eliot Kang (acting) January 20, 2009 June 15, 2009 George W. Bush
Barack Obama
- Vann Van Diepen (acting) June 15, 2009 September 26, 2011 Barack Obama
2 Thomas M. Countryman September 27, 2011 January 27, 2017 Barack Obama
Donald Trump
- C.S. Eliot Kang (acting) January 27, 2017 January 8, 2018 Donald Trump
3 Christopher Ashley Ford January 9, 2018 January 8, 2021
- C.S. Eliot Kang (acting) January 8, 2021 March 31, 2022 Donald Trump
Joe Biden
4 C.S. Eliot Kang March 31, 2022 Present Joe Biden
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