| Allister Gordon Langlands | Director | 7 Jan 1999 | 2 Feb 2004 | British | 68 years |
| Allister Gordon Langlands | Director | 3 Mar 2004 | 14 Feb 2007 | British | 68 years |
| Allister Gordon Langlands | Director | 11 Sept 2007 | 1 Nov 2012 | British | 68 years |
| Andrew Charles Webster | Director | 12 Aug 2024 | 18 Apr 2025 | British | 45 years |
| Andrew Stuart Mclean | Director | 9 Dec 2019 | 12 Aug 2024 | British | 56 years |
| Carl Anthony Chatfield | Director | 1 Dec 2016 | 9 Dec 2019 | British | 62 years |
| Charles Nicholas Brown | Secretary | 12 Nov 1996 | 23 Mar 1998 | British | - |
| Christopher Edward Milne Watson | Director | 7 Sept 1998 | 7 Jan 1999 | British | 59 years |
| Christopher Edward Milne Watson | Director | 1 Oct 1999 | 14 Feb 2007 | British | 59 years |
| Christopher Edward Milne Watson | Secretary | 1 Oct 1999 | 24 Nov 2003 | British | - |
| Finlay George Crossan | Director | 12 Nov 1996 | 31 Dec 1998 | British | 70 years |
| Graham Good | Director | 7 Jan 1999 | 1 Oct 1999 | British | 77 years |
| Graham Good | Secretary | 23 Mar 1998 | 1 Oct 1999 | British | - |
| Iain Angus Jones | Secretary | 18 Dec 2015 | 12 Jun 2024 | - | - |
| Iain William Torrens | Director | 18 Apr 2025 | 23 Sept 2025 | British | 58 years |
| Ian Gordon Stirling | Director | 18 Dec 2015 | 6 Apr 2018 | British | 69 years |
| Ian Johnson | Director | 2 Feb 2004 | 1 Sept 2010 | British | 75 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| Leslie James Thomas | Director | 19 May 2004 | 30 Jun 2012 | British | 69 years |
| Michael Dear | Director | 14 Feb 2007 | 16 Nov 2009 | British | 55 years |
| Michael Straughen | Director | 1 May 2007 | 31 Aug 2014 | 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 | - | - |
| Trevor Mills Noble | Director | 19 May 2004 | 30 Apr 2007 | British | 80 years |
| William Edgar | Director | 13 Jan 2003 | 19 May 2004 | British | 88 years |
| William Edgar | Director | 19 May 2004 | 31 Jul 2008 | British | 88 years |
| William George Setter | Director | 16 Nov 2009 | 21 Mar 2025 | British | 51 years |