| Allister Gordon Langlands | Director | 4 Sept 1998 | 28 Nov 2003 | British | 68 years |
| Charles Nicholas Brown | Nominee Secretary | 3 Sept 1997 | 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 | - |
| George Graeme Park | Director | 21 Mar 2005 | 22 Nov 2006 | British | 57 years |
| Graham Good | Director | 4 Sept 1998 | 1 Oct 1999 | British | 77 years |
| Graham Good | Secretary | 23 Mar 1998 | 1 Oct 1999 | British | - |
| Hugh Fraser | Nominee Director | 3 Sept 1997 | 2 Apr 1999 | British | 63 years |
| Ian Johnson | Director | 28 Nov 2003 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| 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 | - | - |