| Former (27) |
| Management | 2002 – 2004 |
| Management | 2006 – 2011 |
| Management | 2001 – 2006 |
| Management | 2001 – 2001 |
| Management | 1993 – 1994 |
| Deputy | 1999 – 2000 |
| Unofficial title | 1993 – 1998 |
| Management | 2001 – 2006 |
| Management | 1993 – 1997 |
| Management | 2004 – 2006 |
| Unofficial title | 1993 – 1998 |
| Unofficial title | 2000 – 2002 |
| Unofficial title | 2000 – 2002 |
| Unofficial title | 1997 – 1998 |
| Management | 2011 – 2012 |
| Audit | 1993 – 1994 |
| Management | 2000 – 2001 |
| Management | 1993 – 2001 |
| Unofficial title | 2000 – 2005 |
| Unofficial title | 1993 – 1995 |
| Management | 2000 – 2002 |
| Management | 1993 – 1994 |
| Unofficial title | 1997 – 1998 |
| Unofficial title | 1998 – 2000 |
| Unofficial title | 1998 – 1999 |
| Management | 1998 – 2000 |
| Unofficial title | 2002 – 2005 |