01. October 2000 - 31. December 2002

Dr. Peter Jabcke

01. February 2001 - 31. December 2007

Gerhard Schleif

01. January 2003 - 30. April 2005

Eberhard Tschentke

01. May 2005 - 30. November 2005

Werner Gatzer

08. December 2005 - 30. April 2008

Gerd Ehlers

since 01. February 2008

Dr. Carl Heinz Daube

since 15. June 2008

Dr. Carsten Lehr