| Adrian Charles Harold Williams | Secretary | 8 Dec 2006 | 15 May 2007 | British | - |
| Andrew Timothy Lothian | Director | 13 Jun 2001 | 22 Oct 2001 | British | 66 years |
| Blair Milton Nicholls | Director | 11 Nov 2004 | 21 Nov 2006 | Australian | 59 years |
| Brian Raymond Cotterill | Director | 10 Mar 1998 | 16 Nov 1999 | Australian | 85 years |
| Brian Walter Pomeroy | Director | 30 Sept 2012 | 21 Oct 2014 | British | 82 years |
| Carl Robert Patek | Director | 3 Jul 1991 | 31 Mar 1995 | American | 88 years |
| Charles Daniel Mires | Director | 13 Jun 1995 | 31 Oct 1996 | American | 66 years |
| Cheryl Karen Curtis | Director | 5 Feb 2013 | 31 May 2015 | British | 59 years |
| Christopher John Ridgwell | Director | 3 Jul 1991 | 15 Nov 1996 | British | 81 years |
| David Martin Siesko | Director | 5 Feb 2013 | 30 Jun 2013 | American | 65 years |
| Desmond Fogarty | Director | 5 Oct 1999 | 1 Dec 2006 | Irish | 65 years |
| Dominic John Clayden | Director | 9 Dec 2013 | 29 Jun 2015 | British | 60 years |
| Edna Gayle Tollifson | Director | 13 Jun 2001 | 30 Apr 2004 | Australian | 72 years |
| Edward William Young | Director | 1 Dec 1994 | 31 Oct 1996 | American | 86 years |
| Esther Felton Smith | Secretary | 29 Jun 2015 | 26 Jun 2017 | - | - |
| Francis Michael O'halloran | Director | 15 Nov 1996 | 1 Dec 2006 | Australian | 80 years |
| Harold Edward Charles Shergold | Director | 3 Jul 1991 | 31 Mar 1995 | Usa | 90 years |
| Hugh Glen Pallot | Secretary | 24 Jul 1998 | 8 Dec 2006 | British | - |
| Ian David Beckerson | Director | 10 Mar 2005 | 29 Jun 2015 | British | 59 years |
| Jan Leflot | Director | 30 Sept 2012 | 29 Jun 2015 | Belgian | 74 years |
| Joe Gordon | Director | 9 Jul 2014 | 29 Jun 2015 | British | 64 years |
| John David Neal | Director | 30 Sept 2012 | 18 Sept 2013 | British | 62 years |
| John Donald Callahan | Director | 3 Jul 1991 | 1 Jan 1995 | Usa By Birth | 95 years |
| John Terrence Kelaher | Director | 15 Mar 1995 | 15 Nov 1996 | Canadian | 83 years |
| Jonathan Wyn Parry | Director | 30 Sept 2012 | 31 Dec 2018 | British | 63 years |
| Kurt Angst | Director | 3 Jul 1991 | 5 Aug 1992 | Swiss | 78 years |
| Luc Boghe | Director | 30 Sept 2012 | 29 Jun 2015 | Belgian | 69 years |
| Martin Andrew Bower | Director | 15 Nov 1996 | 28 Feb 2001 | British | 80 years |
| Mary Denise Greenhalgh | Secretary | 15 Nov 1996 | 6 Jan 1997 | British | - |
| Michael Ferghal O'regan | Director | 5 Oct 1999 | 22 Oct 2004 | Irish | 64 years |
| Myron Jay Resnick | Director | 3 Jul 1991 | 31 Aug 1995 | Usa By Birth | 95 years |
| Neil Gregory Drabsch | Director | 15 Aug 1997 | 21 May 1999 | Australian | 77 years |
| Paul Edward Glen | Director | 7 Dec 2000 | 18 Oct 2004 | British | 66 years |
| Paul James Moss | Director | 27 Nov 2001 | 31 Mar 2008 | British | 76 years |
| Paul John Hosking | Director | 31 Oct 2001 | 31 Oct 2002 | British | 59 years |
| Paul Liam Horgan | Director | 30 Sept 2012 | 29 Jun 2015 | British | 58 years |
| Peter Ernest Grove | Director | 11 Nov 2004 | 31 Dec 2009 | British | 77 years |
| Peter Ernest Grove | Director | 30 Sept 2012 | 31 Dec 2013 | British | 77 years |
| Peter Richard Wilkins | Director | 30 Sept 2012 | 29 Jun 2015 | British | 56 years |
| Peter William Donovan | Director | 3 Jul 1991 | 15 Nov 1996 | British | 75 years |
| Peter William Donovan | Secretary | 3 Jul 1991 | 15 Nov 1996 | British | - |
| Philip Andrew Dodridge | Director | 30 Sept 2012 | 19 Dec 2016 | British | 58 years |
| Philip Vernon Olsen | Director | 30 Sept 2012 | 31 Dec 2014 | British | 81 years |
| Richard James Macgregor | Director | 5 Oct 1999 | 30 Jun 2001 | British | 68 years |
| Richard James Macgregor | Secretary | 6 Jan 1997 | 24 Jul 1998 | British | - |
| Robert Michael Grant | Director | 15 Nov 1996 | 17 Oct 2000 | British | 73 years |
| Robert Thomas Faber | Director | 23 Jun 1994 | 5 Sept 1996 | Us Citizen | 75 years |
| Ronald Thomas Stewart Macpherson | Director | 3 Jul 1991 | 15 Nov 1996 | British | 106 years |
| Sharon Maria Boland | Secretary | 15 May 2007 | 29 Jun 2015 | British | - |
| Steven Michael Price | Director | 13 Jun 2001 | 9 Aug 2005 | British | 67 years |
| Steven Paul Burns | Director | 17 Sept 2004 | 1 Oct 2013 | British | 68 years |
| Stuart William Sinclair | Director | 23 Oct 2014 | 31 Dec 2018 | British | 73 years |
| Wai-fong Au | Director | 30 Sept 2012 | 31 Dec 2018 | British | 70 years |
| Wayne Evans Hedien | Director | 3 Jul 1991 | 1 Jan 1995 | Usa By Birth | 92 years |
| Wayne Lewis | Director | 31 Oct 2001 | 28 Sept 2004 | British | 68 years |