| Allister Gordon Langlands | Director | 26 Jan 2000 | 1 Jan 2006 | British | 68 years |
| Christopher Edward Milne Watson | Director | 21 Jan 2000 | 15 Oct 2012 | British | 59 years |
| Christopher Edward Milne Watson | Secretary | 21 Jan 2000 | 24 Nov 2003 | British | - |
| Hugh Fraser | Director | 21 Jan 2000 | 26 Jan 2000 | British | 63 years |
| Ian Johnson | Secretary | 24 Nov 2003 | 1 Sept 2010 | British | - |
| Mark Harry Papworth | Director | 4 Feb 2005 | 29 Jun 2012 | British | 61 years |
| Mark Stephen Dobler | Director | 29 Jun 2012 | 15 Oct 2012 | American | 63 years |
| Robert Muirhead Birnie Brown | Director | 15 Oct 2012 | 19 Dec 2015 | British | 56 years |
| Robert Muirhead Birnie Brown | Secretary | 1 Sept 2010 | 18 Dec 2015 | - | - |