Assistant Secretary of State for International Security and Nonproliferation
Template:Use American English Template:Short description Template:Use mdy dates Template:Infobox Political post 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
| # | 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 | January 20, 2025 | Joe Biden |
| - | Ann K. Ganzer (acting) | January 20, 2025 | March 7, 2025 | Donald Trump |
| - | Paul Watzlavick (Senior Bureau Official) | March 7, 2025 | Present |