US defense and foreign policy, NATO, NATO-EU relations, US bilateral defense relations with Europe, arms control
Director, NATO Policy, Office of the Secretary of Defense, The Pentagon, 2000-2002.
Appointed to Department of Defense Senior Executive Service (Career status), 2000.
Office of the Secretary of Defense Representative, Senior Faculty of the Geneva Centre for Security Policy, Switzerland, 1996-1999.
Director, Non-Nuclear Arms Control, Office of the Secretary of Defense, The Pentagon, 1993-1996
Deputy Director, Verification Policy, and Deputy U.S. Representative, U.S.-Russia Bilateral Consultative Commission, Office of the Secretary of Defense, The Pentagon, 1986-1993.
Non-resident Senior Fellow, Brent Scowcroft Center on International Security, Atlantic Council, since July 2015.
Visiting instructor, Sciences Po (Reims) and Institut d’études politiques (Strasbourg), January 2017.
Distinguished Research Fellow, Institute for National Security Strategy, National Defense University, Washington, DC, 2002-2015.
Office of the Secretary of Defense, The Pentagon, 1986-2002.
Central Intelligence Agency, Directorate for Intelligence, 1980-1986.
Office of Representative Edward Biester, Jr., U.S. Congress, 1975-1978.
Correspondent, Le Point, 1973-1975, 1979-1980.
U.S. Navy officer, 1969-1972.
Master of Arts, Johns Hopkins School of International Studies
Bachelor of Arts, Woodrow Wilson School of Public and International Affairs, Princeton University