- Janet Gaymer from 1998 to 2001
- Hubert Flichy from 2001 to 2003
- Franco Toffoletto from 2003 to 2007
- Costas Kyriakides from 2007 to 2009
- Els de Wind from 2009 to 2011
- Guy Castegnaro from 2011 to 2015
- Claire Toumieux from 2015 to 2017
- Bartlomiej Raczkowski from 2017 to 2019
- Klaus-Stefan Hohenstatt from 2019 to 2023
