| Current (3) |
| Founder | 1986 |
| Management | 2023 |
| Chief Executive Officer | 2023 |
| Former (22) |
| Deputy | 1986 – 1997 |
| Chief Executive Officer | 2003 – 2009 |
| Deputy | 2017 – 2018 |
| Chief Executive Officer | 2019 – 2023 |
| Management | 1986 – 2003 |
| Chief Executive Officer | 2010 – 2016 |
| Deputy | 2009 – 2013 |
| Chief Executive Officer | 2016 – 2019 |
| Management | 1986 – 1988 |
| Management | 2012 – 2015 |
| Deputy | 1986 – 2001 |
| Management | 1986 – 1988 |
| Management | 1986 – 1992 |
| Deputy | 2005 – 2009 |
| Management | 1986 – 1992 |
| Deputy | 2018 – 2020 |
| Deputy | 2013 – 2017 |
| Deputy | 1997 – 2001 |
| Deputy | 1986 – 1997 |
| Deputy | 2001 – 2005 |
| Deputy | 2001 – 2005 |
| Management | 2010 – 2012 |
