· Associate professor, Dept. of Soil Science, Faculty of Agriculture, University of Khartoum, Shambat, Sudan (since 1994).

· Assistant professor. Dept. of Soil Science, Faculty of Agriculture, University of Khartoum, Shambat, Sudan (1989-1993).

· Lecturer, Dept. of Soil Science, Faculty of Agriculture University of Khartoum, Shambat, Sudan (1982-1989).

· Senior scholar on study for Ph.D. degree in the University Newcastle Upon Tyne, NEI,7RU,England (1979-1982).

· Senior scholar on study for M.Sc. degree in the University Newcastle Upon Tyne, NEI, 7RU,England (1977-1978).

· Teaching assistant, Dept. of Biochem. And Soil Science, Faculty of Agriculture, University of Khartoum, Sham bat, Sudan (1974-1977).