| Title | Month, Year |
| Director, Center for Sustainable Development, CAS, Qatar University | 8th August 2021- |
| Qatar Shell Distinguished Professor in Sustainable, College of Arts and Sciences, Center for Sustainable Development, Qatar University | From 30 January, 2019- |
| Director of the Centre of Biotechnology of Sfax (CBS, Sfax), Tunisia | 19 October 2010 – 13 November 2018 |
| Head Laboratory of Environmental Bioprocesses (LBPE, CBS) | April 2010 – January 2019 |
| Head Laboratory of Bioprocesses (LBP, CBS) | November 2002 – March 2010 |
| Full Professor | Since April 2001 |
| Head of Valorisation Unit at CBS | November 1998 – October 2002 |
| Associate Professor (MC) | August 1995 |
| Assistant Professor (MA) | February1994 |
| Head Bioenergy Unit at CBS | May 1993 – October 1998 |
| Assistant (A) | March 1990 |
