| Current (2) |
| Chief Executive Officer | 2023 |
| Management | 2006 |
| Former (15) |
| Management | 2004 – 2012 |
| Chief Executive Officer | 2015 – 2019 |
| Audit | 1989 – 1990 |
| Chief Executive Officer | 1989 – 1998 |
| Chief Executive Officer | 2001 – 2005 |
| Management | 1989 – 1993 |
| Management | 1998 – 2001 |
| Management | 1989 – 1993 |
| Chief Executive Officer | 2019 – 2023 |
| Management | 2000 – 2001 |
| Audit | 1989 – 1991 |
| Management | 1989 – 2000 |
| Management | 2001 – 2006 |
| Management | 1989 – 1990 |
| Chief Executive Officer | 2012 – 2015 |
