n     1981–1984  Teaching Assistant, Physics Department, University of Qatar, Doha, Qatar.

n     1984–1991  Lecturer, Physics Department, University of Qatar, Doha, Qatar.

n     1991–2002 Assistant Professor, Physics Department, University of Qatar, Doha, Qatar.

n     1998-1999 Research Fellow, Department of Physics and Astronomy, University College London, London, UK.

n     2003– now Associate Professor, Physics Department, University of Qatar, Doha, Qatar.