Teaching Assistant, Department of Botany and Agricultural Biotechnology, Faculty of Agriculture, University of Khartoum, 1975 -1976.
Senior Scholar, Department of Botany and Agricultural Biotechnology, Faculty of Agriculture, University of Khartoum, 1976 -1981 (scholarship to study for Ph.D. at the University of New castle, U.K.).
Assistant Professor, Department of Botany and Agricultural Biotechnology, Faculty of Agriculture, University of Khartoum, 1980 -1992.
Associate Professor, Faculty of Science, Omar Mukhtar University, Libya.
Associate Professor, Department of Botany and Agricultural Biotechnology, Faculty of Agriculture, University of Khartoum, 1998.
