Ambassador, Alternate Permanent Representative of Costa Rica, Geneva, Permanent Mission of Costa Rica. Ambassador to the United Nations Conference on Disarmament, Geneva, 1990-1991. Member, United Nations Committee(s) on Elimination of Racial Discrimination, Geneva, 8892.
Member, United Nations Commission on Human Rights, 1988-1990. Member, International Institute of Humanitarian Law, Italy, since 1989. Professor of International Law, University of Costa Rica, 1979-1983.