| Alexander Anthony Rodgers | Director | 1 Apr 1991 | 31 Oct 1996 | British | 80 years |
| Allister Gordon Langlands | Director | 31 Oct 1996 | 24 Nov 2003 | British | 68 years |
| Charles Nicholas Brown | Director | 31 Oct 1996 | 23 Mar 1998 | British | 79 years |
| Charles Nicholas Brown | Secretary | 27 Jul 1989 | 23 Mar 1998 | British | - |
| 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 | - |
| Edwin Charles Garrett | Director | 27 Jul 1989 | 2 Jul 1990 | British | 94 years |
| George Graeme Park | Director | 21 Mar 2005 | 22 Nov 2006 | British | 57 years |
| Gordon William Smith | Director | 27 Jul 1989 | 29 Jul 1996 | British | 87 years |
| Graham Good | Director | 23 Mar 1998 | 1 Oct 1999 | British | 77 years |
| Graham Good | Secretary | 23 Mar 1998 | 1 Oct 1999 | British | - |
| Ian Clark Wood | Director | 27 Jul 1989 | 1 Jun 1993 | British | 84 years |
| Ian Forbes Mcskimming | Director | 1 Jan 1989 | 29 Jul 1996 | British | 83 years |
| Ian Johnson | Director | 24 Nov 2003 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| John Arthur Lee | Director | 25 Jun 1992 | 29 Jul 1996 | British | 69 years |
| Michael Dear | Director | 22 Nov 2006 | 16 Nov 2009 | British | 55 years |
| Michael George Ironside | Director | 1 May 1991 | 19 Aug 1993 | British | 75 years |
| Mitchell Scott Semple | Director | 2 Jul 1990 | 2 Aug 1991 | British | 83 years |
| Neil Harvie | Director | 24 Jan 1994 | 31 Oct 1996 | British | 67 years |
| Richard Hogg | Director | 1 Jan 1989 | 31 Mar 1990 | British | 91 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 | - | - |
| Robert Sommerville Drummond | Director | 1 Oct 1992 | 14 May 1996 | British | 71 years |
| Stuart Hall | Director | 6 Jul 1992 | 1 Jun 1993 | British | 77 years |
| Trevor James Butler | Director | 1 Nov 1993 | 29 Jul 1996 | British | 68 years |
| William Douglas Bertram | Director | 27 Jul 1989 | 1 Jan 1989 | British | 91 years |
| William Edgar | Director | 1 Sept 1995 | 31 Oct 1996 | British | 88 years |
| William Hadden Carr | Director | 27 Jul 1989 | 1 Sept 1995 | British | 93 years |