| Current (4) |
| Audit | 2020 |
| Audit | 2025 |
| Chief Executive Officer | 2020 |
| Stakeholder | 1999 |
| Former (16) |
| Audit | 2000 – 2008 |
| Audit | 2008 – 2020 |
| Audit | 1995 – 2003 |
| Audit | 2008 – 2015 |
| Audit | 1995 – 1997 |
| Management | 1995 – 2001 |
| Audit | 2008 – 2010 |
| Audit | 2004 – 2010 |
| Audit | 1998 – 2007 |
| Audit | 2004 – 2007 |
| Management | 1995 – 2006 |
| Management | 1995 – 2000 |
| Chief Executive Officer | 2007 – 2020 |
| Audit | 1997 – 2001 |
| Audit | 1995 – 1999 |
| Chief Executive Officer | 2020 – 2020 |