| Andrew Gilbert Charlesworth | Director | 29 Mar 2004 | 26 Mar 2007 | British | 54 years |
| Christian Lucien Corpetti | Director | 10 Oct 2011 | 13 Mar 2017 | French | 53 years |
| David Nicol | Director | 28 Mar 2006 | 12 May 2006 | Australian | 66 years |
| Edward William Mountney | Director | 13 Mar 2017 | 30 Apr 2019 | British | 40 years |
| Elizabeth Anne Wood | Director | 24 Mar 2003 | 30 Mar 2004 | British | 52 years |
| Elizabeth Anne Wood | Secretary | 24 Mar 2003 | 30 Mar 2004 | British | - |
| Ian Joseph Wells | Director | 14 Dec 2005 | 26 Feb 2009 | British | 74 years |
| James Lindon Saunders | Director | 20 Apr 2007 | 27 Jul 2010 | British | 60 years |
| Joanne Stonehouse Fyfe | Director | 15 Dec 2020 | 1 Oct 2024 | British | 59 years |
| Julian Denzil Sutcliffe | Director | 30 Apr 2019 | 22 Nov 2023 | British | 57 years |
| Julian Denzil Sutcliffe | Director | 4 Nov 2024 | 23 Oct 2025 | British | 57 years |
| Maria Lewis | Secretary | 3 Feb 2010 | 4 Sept 2015 | British | - |
| Mark Cook | Director | 24 Mar 2003 | 30 Mar 2004 | British | 60 years |
| Masume Hidayatullah | Director | 29 Mar 2004 | 1 Nov 2004 | British | 61 years |
| Michael Baybutt | Director | 26 Feb 2009 | 16 Aug 2013 | British | 71 years |
| Neil Andrew Woodburn | Director | 31 Oct 2016 | 30 Apr 2019 | British | 46 years |
| Peregrine Murray Addison Lloyd | Director | 5 May 2004 | 20 Apr 2007 | British | 69 years |
| Peter Geoffrey Shell | Secretary | 30 Mar 2004 | 23 Mar 2007 | British | - |
| Richard Leonard Groome | Director | 26 Feb 2009 | 29 Aug 2013 | British | 74 years |
| Robert Michael Riddelsdell | Director | 17 Nov 2004 | 11 Nov 2005 | British | 69 years |
| Roger Keith Miller | Secretary | 23 Mar 2007 | 3 Feb 2010 | British | - |
| Sarah Jayne Doyle | Director | 29 Aug 2013 | 30 Sept 2016 | British | 55 years |
| Saul David Scheider | Director | 31 Mar 2010 | 15 Feb 2012 | British | 57 years |
| Stuart Martin Colvin | Director | 26 Mar 2007 | 10 Oct 2011 | British | 53 years |
| Teresa Sarah Hedges | Secretary | 4 Sept 2015 | 17 Sept 2018 | - | - |
| Vikki Louise Everett | Director | 29 Mar 2004 | 31 Mar 2010 | British | 54 years |
| Vikki Louise Everett | Director | 3 Jun 2019 | 15 Dec 2020 | British | 54 years |