| Date | Position |
| 1976 -1977 | District Veterinary Officer, Port Sudan. |
| 1977 -1982 | Counterpart national staff, Food and Agriculture Organization (FAO) of the United Nations, Ticks and Tick-borne Diseases Control Project, Sudan. |
| 1982 -1988 | Head, Tick Research Unit at the Central Veterinary Research Laboratories, Khartoum, Sudan. |
| 1988 – 1998 | Research Scientist working on tick ecology at the International Centre of Insect Physiology and Ecology (ICIPE), Nairobi, Kenya, in charge of a unit of the tick programme section at Mbita Point Field Station of ICIPE at Lake Victoria, Western Kenya. |
