thumb|Greg Thielmann
A. Gregory Thielmann is a former mid-level official in the U.S. State Department's Bureau of Intelligence and Research who, after retiring in September 2002, publicly disputed the rationale for the U.S. invasion of Iraq offered by the George W. Bush administration. He is currently a board member of the Arms Control Association and member of the Council on Foreign Relations. His areas of expertise and research include threat assessments, nuclear/missile proliferation, and US-Russian strategic arms control.
Career
A native of Newton, Iowa, Alan Gregory Thielmann is a graduate of Grinnell College and the Woodrow Wilson School of Public and International Affairs at Princeton University (1975). Thielmann worked as a budget examiner in the National Security Division of the Office of Management and Budget before entering the United States Foreign Service, where he served for more than 25 years, working in arms control and security issues. He was acting director of the Strategic, Proliferation, and Military Affairs Office in the Bureau of Intelligence and Research at the State Department at the time of his retirement.