1984 – 1987 Agricultural engineer (Yemen Arabic Republic)

1987 – 1989 M.Sc. student and par time teaching assistant (U of K)

1989 – 1990 Agricultural Manager (Yemen Arabic Republic)

1990 – 1993 Teaching assistant (staff), U of K.

1993 – 1997 Lecturer (U of K)

1997 – 2001 Ph.D. student (UPM), Malaysia

2001 – 2002 Assistant Professor, Department of Soil & Environment Sciences, (U of K)

2002 – 2007 Coordinator of Desert Cultivation and Desertification affected Soils

2004 – 2010 Associate Professor

2010 – To date Professor

2007 – To date Director, Desertification and Desert Cultivation Studies Institute, U of K.