Scientist, United Nations Development Program/World Bank/World Health Organization Special Program for Research and Training in Tropical Diseases, World Health Organization since 1981. Secretary, Steering Committee(s) on African Trypanosomiases, World Health Organization, Geneva, since 1981. Scientist/Project(s) Leader, World Health Organization Interregional Project(s) for Applied Rch on African Trypanosomiasis, Cote d'Ivoire, 1979-1981.
Scientist/Senior Entomologist, World Health Organization, Burkina Faso, 1978-1979. Scientist/Entomologist, World Health Organization Onchocericasis Control Project(s), Ministry of Health, Guinea, 1974-1978. Senior Rch Officer, Volta Lake Rch Project(s), United Nations Development Program/Ghana Government, 1966-1974.
Rch Officer (Entomologist), Volta River Authority, Ghana Government, 1962-1964.