1.        Research Assistant, Medical Research Council, (Michigan Laboratory,

     National Health laboratory), 1985 – 1986.

2.           Teaching Assistant, Zoology Department, Faculty of Science,

    University of Khartoum, 1986-1990.

3.              Lecturer, Zoology Department, Faculty ofScience, University of Khartoum,

     1991 – 1997.

4.              Assistant Professor, Zoology Department, Faculty of Science, University ofKhartoum, since 1998.

5.              Dead Department of Human Biology, Preparatory College University of  Medical Sciences and Technology, 1997 – 2005.

6.              Consultant, Federal Ministry of Health – Bilharzia and  Intestinal

     Helminthes Control Program, 2000 – 2009.

7.              Fellow, Medical Research Unit, National Ribat University, 2006 – 2009.

8.              Head, Sudanese American Scientific Group, Bladder Cancer and Renal

     Failure Related to Bilharzia, 2006 – 2009.

9.              Deputy, Directorate of Scientific Research and Cultural Relations, University of Khartoum, 2006 – 2007.

10.            Director, Directorate of Scientific Research and Cultural Relations, University of Khartoum, since 2007.