Scientist, Human Reproductive Program, World Health Organization since 1990. Professor of Public Health, Pharmacology & Toxicology, University of Nairobi, Kenya, 1989-1990. Visiting Scientist, Biomedical Division, The Population Council, United States of America, 1972-1974.
Professor of Physiology, University of Odense, Denmark, since 1968. Pharmacologist/ Toxicologist, Ferrosan AB, Sweden, 1962-1968. Danish Army, 1961-1962.