| Chair | Start | Finish |
| David Thiel | 22nd February 1985 | 16th September 1985 |
| Miles Moody | 17th September 1985 | 31st October 1987 |
| Mat Darveniza | 1st November 1987 | 31st December 1989 |
| Neil W. Bergmann | 1st January 1990 | 30th June 1991 |
| Ross A. Lawson | 1st July 1991 | 30th September 1992 |
| Robert J. Prandolini | 1st October 1992 | 30th September 1994 |
| Simon J. Ellis | 1st October 1994 | 31st December 1996 |
| Mat Darveniza | 1st January 1997 | 31st December 1997 |
| Mohamed Deriche | 1st January 1998 | 31st December 2000 |
| Edward W. Palmer | 1st January 2001 | 31st December 2002 |
| Peter R. Sutton | 1st January 2003 | 31st December 2003 |
| Renate Sitte | 1st January 2004 | 31st May 2005 |
| Tapan K. Saha | 1st June 2005 | 31st December 2006 |
| Ian V. Clarkson | 1st January 2007 | 31st December 2008 |
| Abbas Bigdeli | 1st January 2009 | 31st December 2010 |
| Roelof Swanepoel | 1st January 2011 | 31st December 2011 |
| Abbas Bigdeli | 1st January 2012 | 31st December 2012 |
| Tapan K. Saha | 1st January 2013 | 31st December 2014 |
| Garry Einicke | 1st January 2015 | |
