Netherlands Institute for Statistics and Operations Research. Society for International Development.
Country Director, Nigeria, Africa Division, United Nations Population Fund since 1989. Country Director (Peru, Bolivia, Paraguay), Latin America & Caribbean Division, United Nations Population Fund, Peru, 1986-1989. Tech Advisor, Department of Technical Cooperation for Development, United Nations, New York, 1980-1986.
Science(s) Expert, World Fertility Survey, International Statistical Institute, United Kingdom, 1974-1980. Expert/Chief of Mission (Peru), International Tech Assistance Department, Ministry of Foreign Affairs, Netherlands, 1968-1974. Science(s) Association, Institute for Sociology, University of Nijmegen, Netherlands, 1964.