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"Though we have acheived progress, our work is not over. That is why I support the mission of the Arms Control Association. It is, quite simply, the most effective and important organization working in the field today." 

– Larry Weiler
Former U.S.-Russian arms control negotiator
August 7, 2018
Greg Thielmann

Greg Thielmann

Greg Thielmann most recently served as a senior professional staffer of the Senate Select Committee on Intelligence (SSCI). Prior to joining the SSCI in 2005, he was a U.S. Foreign Service Officer for 25 years, last serving as Director of the Strategic, Proliferation and Military Affairs Office in the Department of State’s Bureau of Intelligence and Research. His foreign posts include Deputy Political Counselor of the U.S. Embassy in Brasilia, Brazil; Political-Military Affairs Officer in Moscow, USSR; and Political-Military Affairs Officer in Bonn, Germany. Thielmann also served as the Deputy Office Director in the State Department’s Office of German, Austrian and Swiss Affairs; Special Assistant to Ambassador Paul Nitze (then Special Adviser to the President and Secretary of State on Arms Control Matters); and State Department advisor to the U.S. Delegation at the Geneva INF arms control negotiations. Greg is a member of the Council on Foreign Relations and a former member of the Board of Directors of the Arms Control Association (2003-2005). His July 2003 appearance at an ACA press briefing on faulty intelligence assessments on Iraq’s WMD capabilities <http://www.armscontrol.org/events/iraq_july03> led to a CBS News 60 Minutes II segment <http://www.cbsnews.com/stories/2003/10/14/60II/main577975.shtml> titled “The Man Who Knew,” which won an Emmy Award for reporter Scott Pelley.


Greg Thielmann's primary research areas include: