Head, Food and Agriculture Organisation/International Atomic Energy Agency Agr Laboratory, Department of Research and Isotopes, International Atomic Energy Agency since 1990. Tech Officer, Animal Production & Health Section, Joint Food and Agriculture Organisation/International Atomic Energy Agency Division, Vienna, 1985-1990. Senior Tutor, Head Dairy Husbandry Department, Somerset College of Agr & Horticulture, Somerset Education Authority, United Kingdom, 1984.
Crown Officer, Head Dairy Husbandry Department, Central American School of Animal Husbandry, Costa Rica, Overseas Development Administration, United Kingdom, 1980-1983. Senior Rch Fellow, Animal Production Section, Centre for Tropical Veterinary Medical, University of Edinburgh, Scotland, 7580. Senior Lecturer, Animal Production Section, Fey of Agr & Veterinary Medical, University of Nairobi, Kenya, 7275.
Lecturer, Animal Physiology Department, Makerere University, Kampala, Uganda, 1971-1972.