| Anton Kung | Director | 1 Aug 2001 | 31 May 2013 | Swiss | 72 years |
| Daniel John O'sullivan | Director | 2 Jul 1996 | 1 Apr 2003 | British | 88 years |
| Daniel John O'sullivan | Secretary | 2 Jul 1996 | 1 Apr 2003 | British | - |
| Daniel Rothstein Ruff | Director | 16 Jul 2018 | 14 Dec 2023 | American | 47 years |
| David Arthur Richard Vallat | Director | 9 Jul 1991 | 2 Jul 1996 | British | 76 years |
| David Arthur Richard Vallat | Secretary | 24 Nov 1992 | 2 Jul 1996 | British | - |
| Dean Porter Andrews | Director | 25 Sept 1997 | 31 Jan 2008 | Usa | 74 years |
| Erik Peter Woit | Director | 2 Jul 1996 | 9 Aug 1997 | Usa | 95 years |
| Francesco Delle Piane | Director | 19 Oct 2001 | 7 Jun 2013 | Italian | 99 years |
| Francesco Dellepiane | Director | 2 Jul 1996 | 12 Jul 2001 | Italian | 99 years |
| Ian Routledge | Director | 12 Jul 2001 | 19 Oct 2001 | Australian | 75 years |
| James Gavin Struthers | Director | 1 Apr 2003 | 7 Oct 2005 | British | 63 years |
| James Gavin Struthers | Secretary | 1 Apr 2003 | 7 Oct 2005 | British | - |
| John Michael Ritson | Secretary | 9 Jul 1991 | 24 Nov 1992 | British | - |
| John Thomas Landry Jnr | Director | 4 Feb 1997 | 15 Dec 2016 | Usa | 70 years |
| Michael John Blandy | Director | 9 Jul 1991 | 2 Jul 1996 | British | 74 years |
| Paul Martin White | Director | 7 Oct 2005 | 8 Jul 2011 | British | 62 years |
| Paul Martin White | Secretary | 7 Oct 2005 | 8 Jul 2011 | British | - |
| Philip Alan Calvert | Secretary | 8 Jul 2011 | 7 Jun 2013 | - | - |
| Philip Alan Calvert | Director | 8 Jul 2011 | 7 Jun 2013 | British | 74 years |
| Philippe Carl Joseph Cassis | Director | 30 Mar 2016 | 21 Jun 2018 | German | 64 years |
| Richard Adam Pell Blandy | Director | 9 Jul 1991 | 2 Jul 1996 | British | 91 years |
| Richard Francis Blandy | Director | 9 Jul 1991 | 2 Jul 1996 | British | 79 years |
| Richard Levine | Secretary | 7 Jun 2013 | 12 Jul 2019 | - | - |
| Richard Levine | Director | 7 Jun 2013 | 12 Jul 2019 | American | 65 years |
| Richard Strachan Hargreaves | Director | 9 Jul 1991 | 24 Oct 1993 | British | 107 years |
| Robert Koren | Director | 12 Aug 2019 | 31 Dec 2022 | Italian | 68 years |
| Sandro Fabris | Director | 31 Jan 2008 | 3 Mar 2010 | Italian | 70 years |
| Ulisses Amandio Dias Marreiros | Director | 14 May 2010 | 21 Mar 2013 | Portuguese | 52 years |
| Veronique Robin Amour | Director | 12 May 2020 | 5 Jun 2024 | French | 55 years |