2002 –                       Associate Professor  at the Dept. of Zoology, Faulty of Science, University of Khartoum, Sudan.

1998 – 2000             Head Dept. of Zoology, Faculty of Science, University of Khartoum, Sudan.

2003 – 2004             Vice Dean Faculty of Science, University of Khartoum- Sudan.

1993 – 1999:            Assistant professor at the Dept. of Zoology, Faculty of Science, University of Khartoum, Sudan.

1988 – 1993:            Lecturer University of the United Arab Emirates (on secondment).

1994 – 1995:            Assistant professor at the Dept of Zoology University Garyounis, Libya.

1981 – 1988:            Lecturer at Natural history museum, Faculty of Science U. of Khartoum, Sudan.

1971 – 1981:            Demonstrator Dept. of Zoology, Faculty of Science, University of Khartoum, Sudan