2009- date  Director, Institute of Environmental Studies, U of K

2005- date  Editor-in-chief, Journal of Sudan Silva, Sudanese Forest Society

2001- date  President, Sudanese Forest Society

1993- date  Faculty Member, Faculty of Forestry, U of K

1992- date  Technical Consultant, Kenana irrigated forest plantation project

1991- date  Technical Collaborator, the National Forest corporation, Sudan

2001-2005  Head, Department of Silviculture, Faculty of Forestry, U of K

2000-2003  Coordinator, Arid Land Unit, Institute of Environmental Studies, U of K

1999-2000  Deputy Dean, Faculty of Forestry, U of K

1993-1999  Graduate Student Coordinator, Faculty of Forestry, U of K

1996-1999  Coordinator, graduate student’s seminars, Faculty of Forestry, U of K

1993-1994  Head, Department of Silviculture, Faculty of Forestry, U of K

1989-1990  Postdoctoral Research Assistant, Department of Forestry, University of Florida, Florida, USA

1985-1989  Ph. D Student and Graduate Research Assistant, Department of

Forestry, University of Florida, USA

1982-1985  M.Sc. Student, Oregon State University, Oregon, USA

1980-1990  Teaching Assistant, University of Khartoum, Sudan