1)    1967-1974 Teaching Assistant and Postgraduate student, Faculty of Veterinary Science, University of Khartoum, Sudan.

2)    1974-1978 Assistant professor, Faculty of Veterinary Science, University of Khartoum, Sudan.

3)    1976-1978 Head Dept., Animal Husbandry, Faculty of Veterinary Science, University of Khartoum, Sudan.

4)    1978-1979 Associate Professor, Faculty of Veterinary Science, University of Khartoum, Sudan.

5)    1978-1981 Associate Professor, University of Florida, Gainesville, Florida, U.S.A.

6)    19818-1985 Associate Professor, University of King Saud, Riyadh, Saudi Arabia.

7)    1985-2000 Professor, University of King Saud, Riyadh, Saudi Arabia.

8)    2000- Professor, Faculty of Animal production, University of Khartoum, Sudan.