| Alexander Dron | Director | 1 Nov 1989 | 17 May 1991 | British | 75 years |
| Allister Gordon Langlands | Director | 4 Oct 1993 | 24 Nov 2003 | British | 68 years |
| Charles Nicholas Brown | Director | 1 Jan 1998 | 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 | - |
| David Alan Joiner | Director | 6 Aug 1989 | 4 Oct 1993 | British | 73 years |
| Edwin Charles Garrett | Director | 27 Jul 1989 | 6 Aug 1989 | British | 94 years |
| George Graeme Park | Director | 21 Mar 2005 | 22 Nov 2006 | British | 57 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 Johnson | Director | 24 Nov 2003 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| James Ramsay Spence | Director | 27 Jul 1989 | 6 Aug 1989 | British | 94 years |
| John Buchanan Masterton | Director | 27 Jul 1989 | 7 Dec 1990 | British | 79 years |
| Michael Dear | Director | 22 Nov 2006 | 16 Nov 2009 | British | 55 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 | - | - |
| Stuart Hall | Director | 1 Jun 1993 | 2 Sept 1997 | British | 77 years |
| Thomas Motherwell | Director | 7 Jul 1989 | 31 Dec 1993 | British | 82 years |