Former Assistant Secretary of State, Former Special Assistant to the Secretary of Defense
Former Assistant Secretary of State, Former Special Assistant to the Secretary of Defense
Senior Advisor to the U.S. House of Representatives’ Homeland Security Committee (2002-2005)
National Security Council Senior Director for Russian, Ukrainian, and Eurasian Affairs (1993-1997)
Chief Negotiator, Strategic Arms reduction talks with the Former Soviet Union
Former Under Secretary of the US Air Force (1979-1981), Professor, Tufts University
Senior Research Fellow at the Matthew B. Ridgway Center for International Security Studies
USN (Retired), Former Director of the NSA (1977-81), Former Deputy Director of the CIA (1981-82)
Former Principal Director for European and NATO Affairs in the Office of the Secretary of Defense
Assistant Secretary of Defense for Manpower, Reserve Affairs, Installations, and Logistics (1981-1985)
USMC (Retired), Former Special Strategic Assistant to the Chairman of the Joint Chiefs of Staff
Former Deputy Assistant Secretary of Defense for Peacekeeping and Humanitarian Assistance