“For half a century, ACA has been providing the world … with advocacy, analysis, and awareness on some of the most critical topics of international peace and security, including on how to achieve our common, shared goal of a world free of nuclear weapons.”
Thomas Countryman, Board Chairman
Mr. Countryman was the acting undersecretary of state for arms control and international security. He served for 35 years as a member of the U.S. Foreign Service until January 2017, achieving the rank of minister-counselor, and was appointed in October 2016 to the position of acting undersecretary of state. He simultaneously served as assistant secretary of state for international security and nonproliferation, a position he had held since September 2011.
Contact Information:
[email protected]
Recent Publications and Citations
https://www.armscontrol.org/media-citations/south-china-morning-post/2026-04-24
April 24, 2026
https://www.armscontrol.org/pressroom/2026-04/madman-without-strategy-trumps-latest-threats-are-unacceptable
April 7, 2026
https://www.armscontrol.org/media-citations/newsweek/2026-03-23
March 23, 2026
https://www.armscontrol.org/media-citations/radio-free-europe-radio-liberty/2026-02-12
February 12, 2026
https://www.armscontrol.org/media-citations/news-ghana/2026-02-12
February 12, 2026