Ambassador, Permanent Representative of Canada, Geneva, Permanent Mission of Canada since 1990. Permanent Representative of Canada to the Conference on Disarmament since 1990. Ambassador, Chief Negotiatior, Multilateral Trade Negotiations, since 1989.
Commissioner, Northern Pipeline Agency, Canada, 1988-1990. Deputy Minister for International Trade & Association Under-Secretary of State for External Affairs, Ottawa, 1986-1989. Senior Assistant Deputy Minister, Assistant Deputy Minister, Department of Finance, 1982-1986.
Minister, Deputy Head of Post, Canadian Embassy, Washington, District of Columbia, 1978-1982. Ambassador to Representative of Korea, 1977-1978. Director, Deputy Director, Commercial Policy Division, Department of External Affairs, 1972-1977.
First Secretary & Cons, Canadian Embassy, Belgrade, 1969-1972. Commercial Policy Division, 1967-1969. Third Secretary, Canadian Embassy, Washington, District of Columbia, 1964-1967.