1.Scientist-in-charge, microbiology research, ICARDA/IFAD Nile Valley Project, 1981-1984.

2.Leader, Scientific Team for Implementation of the National Grain Legume Inoculation Program, National Council for Research, 1981-1985.

3. Scientist-in-charge, Project for Improvement of Legume Protein Production, United Nations Environment Program (UNEP) and the National Council for Research, 1984-1988.

4. Director (part-time), the National Laboratory for Legume Inoculant Production and Research, National Council for Research, 1989-1990.

5.Consultant, Microbiology Research, Sudan-Finland Forest Rehabilitation Program,1989-1991.

6.External Examiner for postgraduate degrees at many Sudanese and foreign universities.

7.Designed and implemented Microbiology Curricula for the Faculty of Science, Omar El Mukhtar University, Libya, during the period March 1993-Nov. 1997.