Ambassador, Permanent Representative of Ecuador, Geneva, Permanent Mission of Ecuador since 1990. Ambassador of Ecuador to the Union of Soviet Socialist Republics, 1988-1990. Ambassador to Cuba, 1984.
Coord of the Economic Conference of Latin America, Ecuador, 1984. Ambassador to Uruguay, 1980. Ad Interim Minister of Foreign Affairs, Ecuador.
Under Secretary of Economic Affairs, Ministry of Foreign Affairs, 1979-1981. Director, National Board of Planification & Coordination, Ecuador, 1976-1979.