| Allister Gordon Langlands | Director | 31 Dec 1995 | 28 Nov 2003 | British | 68 years |
| Charles Nicholas Brown | Director | 31 Dec 1995 | 23 Mar 1998 | British | 79 years |
| Charles Nicholas Brown | Secretary | 21 Dec 1993 | 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 Allen Phillips | Director | 14 Apr 1992 | 21 Dec 1993 | British | 69 years |
| David Archibald Macfarlane | Director | 5 Jan 1994 | 31 Dec 1995 | British | 69 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 Johnson | Director | 28 Nov 2003 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| John Patrick Kenny | Director | 31 Dec 1991 | 31 Dec 1995 | United Kingdom | 84 years |
| Michael Dear | Director | 22 Nov 2006 | 16 Nov 2009 | British | 55 years |
| Paul Davies | Director | 31 Dec 1991 | 31 Dec 1995 | United Kingdom | 77 years |
| Philip William John Raven | Director | 14 Apr 1992 | 31 Dec 1995 | British | 75 years |
| Richard Boan | Director | 14 Apr 1992 | 21 Dec 1993 | British | 76 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 | - | - |
| Wsm Services Limited | Corporate Secretary | 31 Dec 1991 | 21 Dec 1993 | United Kingdom | - |