| Alexander Alister Macdonald | Director | 15 Jun 1992 | 30 Nov 1994 | British | 68 years |
| Alexander Alister Macdonald | Secretary | 15 Jun 1992 | 30 Nov 1994 | British | - |
| Allister Gordon Langlands | Director | 27 Sept 1996 | 28 Nov 2003 | British | 68 years |
| Charles Nicholas Brown | Secretary | 27 Sept 1996 | 23 Mar 1998 | British | - |
| Charles Noel Davies | Director | 15 Jun 1992 | 2 Dec 1995 | British | 93 years |
| Christopher Edward Milne Watson | Director | 1 Oct 1999 | 21 Mar 2005 | British | 59 years |
| Christopher Edward Milne Watson | Secretary | 1 Oct 1999 | 24 Nov 2003 | British | - |
| Craig Hart | Director | 15 Jun 1992 | 27 Sept 1996 | British | 76 years |
| George Graeme Park | Director | 21 Mar 2005 | 22 Nov 2006 | British | 57 years |
| Graham Good | Director | 18 May 1998 | 1 Oct 1999 | British | 77 years |
| Graham Good | Secretary | 23 Mar 1998 | 1 Oct 1999 | British | - |
| Helen Bowers Lavitt | Secretary | 1 Dec 1994 | 6 Oct 1995 | British | - |
| Ian Johnson | Director | 28 Nov 2003 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| James Brown Mason | Director | 15 Jun 1992 | 31 Jan 1994 | British | 77 years |
| John Watson | Director | 15 Jun 1992 | 31 Jan 1994 | British | 77 years |
| Kenneth Andrew Wade Taggart | Secretary | 6 Oct 1995 | 27 Sept 1996 | British | - |
| Mark Anthony Wright | Director | 27 Sept 1996 | 5 Mar 1999 | British | 70 years |
| Michael Day | Secretary | 23 Jan 1995 | 3 Jan 1996 | British | - |
| Michael Dear | Director | 22 Nov 2006 | 16 Nov 2009 | British | 55 years |
| Neil Macdonald | Director | N/A | 27 Sept 1996 | British | 81 years |
| Norman Neill Broadhurst | Director | 15 Jun 1992 | 30 Jun 1994 | British | 85 years |
| Patrick Geigel | Director | 27 Aug 1996 | 1 Dec 1997 | American | 79 years |
| Robert David Holden | Director | 30 Jun 1994 | 27 Sept 1996 | British | 70 years |
| Robert Muirhead Birnie Brown | Director | 1 Sept 2010 | 18 Dec 2015 | British | 56 years |
| Robert Muirhead Birnie Brown | Secretary | 1 Sept 2010 | 18 Dec 2015 | - | - |
| Wendell Brooks | Director | 27 Sept 1996 | 1 Dec 1997 | American | 77 years |