Assistant Secretary of State for International Security and Nonproliferation

United States
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
	Incumbent; Thomas M. Countryman; since June 2009
Nominator	Barack Obama
Inaugural holder	Stephen G. Rademaker (acting)
Formation	2005
Website	Official Website

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, counterproliferation, and arms control 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 G. 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. He was succeeded by Acting Secretary Francis C. Record and replaced by John C. Rood.

Assistant Secretaries of State for International Security and Nonproliferation

Name	Assumed Office	Left Office	President(s) served under
Stephen G. Rademaker (acting)	September 2005		George W. Bush
Francis C. Record (acting)			George W. Bush
John Rood	October 2006		George W. Bush
Mary Beth Long	December 21, 2007		George W. Bush
Vann H. Van Diepen (acting)	June 2009		Barack Obama
Thomas M. Countryman	September 27, 2011	Present	Barack Obama

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