This includes participating in the 1988 Moscow summit meeting between President Reagan and President Mikhail Gorbachev, during the former's first visit to the USSR.
He also served as ambassador to the Republic of Moldova, U.S.
Special Negotiator for Eurasian Conflicts in the former Soviet Union (an ambassador-level position), Deputy Assistant Secretary for European and Canadian Affairs in the State Department, director of European and Soviet Affairs for the U.S.