·        2011 - Now Adjunct Professor of Physics, Texas A&M University Qatar, Doha, Qatar.

·        2009– Now Professor of Physics, Qatar  University, Doha, Qatar.

·        2003– 2008 Associate Professor, Physics Department, University of Qatar, Doha, Qatar.

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

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

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

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