From 1976 to 1982
From 1983 to 1985
From 1985 to 1986
From 1986 to 1995
From 1995 to 1997
From 1997 to 2000
Prof. Samir Reyadh Helal
From 2006 to 2010
From 2010 to 2011
From 2012 to 2015
From 2015 to 2017
From May 15th 2018 to July 30th 2021