| Alan Paterson | Director | 1 Oct 1998 | 28 Jan 1999 | British | 78 years |
| Alasdair Macdougall | Director | 9 Jul 2009 | 4 Jul 2014 | British | 66 years |
| Alexander James Grant | Director | 19 Jun 2003 | 4 Oct 2006 | British | 65 years |
| Alexander James Grant | Director | 1 May 2008 | 31 May 2024 | British | 65 years |
| Alyson Marshall | Director | 31 Oct 2006 | 26 Apr 2011 | British | 63 years |
| Andrew Macmaster | Director | 17 Apr 2008 | 3 Mar 2017 | British | 54 years |
| Brian James Leith | Director | 27 Jul 2005 | 23 Jan 2006 | British | 80 years |
| Caroline Anne Sutherland | Secretary | 16 Feb 2004 | 31 Jan 2012 | British | - |
| Charles Monks | Director | 9 Feb 1999 | 2 Feb 2009 | British | 79 years |
| David Fraser Philip | Director | 28 Feb 1989 | 27 Jul 1990 | British | 77 years |
| David Fraser Sutherland | Director | 28 Feb 1989 | 31 Dec 2011 | British | 77 years |
| David Fraser Sutherland | Secretary | 16 Mar 1992 | 16 Oct 1995 | British | - |
| David John Cameron | Director | 16 Feb 1999 | 18 Feb 1999 | British | 84 years |
| Donald James Wright | Director | 3 Jan 2001 | 1 Mar 2001 | British | 77 years |
| Douglas Peters | Director | 4 Sept 2000 | 1 Jun 2001 | British | 59 years |
| Duncan John Campbell | Director | 2 Apr 1990 | 5 Oct 2001 | British | 71 years |
| Fiona Maclennan | Director | 1 Oct 1998 | 16 Feb 2001 | British | 56 years |
| Gary Angus Campbell | Secretary | 16 Oct 1995 | 12 Feb 1997 | British | - |
| George Gabriel Fraser | Director | 27 Apr 1994 | 1 Oct 1998 | British | 72 years |
| George Gabriel Fraser | Director | 31 Dec 2011 | 1 Dec 2021 | British | 72 years |
| Gordon Melville | Director | 4 Aug 2003 | 9 Oct 2003 | British | 72 years |
| Iain Stewart | Director | 9 Oct 2000 | 8 Dec 2000 | British | 73 years |
| Ian Macdonald | Director | 14 May 2002 | 28 Feb 2020 | British | 61 years |
| Ian Macdougall Chavasse | Director | 1 Jul 1992 | 31 Mar 1998 | British | 89 years |
| James Cameron | Secretary | 31 Jan 2012 | 29 Jun 2012 | British | - |
| Katherine M Stewart | Director | 28 Feb 1989 | 16 Mar 1992 | British | 72 years |
| Katherine M Stewart | Secretary | 28 Feb 1989 | 16 Mar 1992 | British | - |
| Keith Roy Duncan | Director | 1 Sept 2007 | 13 Sept 2010 | British | 55 years |
| Lynne Mackenzie Boyd | Director | 18 Dec 1998 | 6 Jun 2000 | British | 61 years |
| Marjory Bremner Muir | Director | 20 Nov 2006 | 3 Mar 2009 | British | 66 years |
| Marjory Bremner Trace | Director | 12 Feb 2004 | 4 Oct 2004 | British | 66 years |
| Marjory Bremner Trace | Secretary | 12 Feb 1997 | 16 Feb 2004 | British | - |
| Michelle Hunter Motion | Director | 1 Dec 2021 | 10 Mar 2023 | British | 56 years |
| Neil Edward Strain | Director | 2 Apr 1993 | 1 Jul 1996 | British | 72 years |
| Neil Stuart Cameron | Director | 28 Feb 1989 | 31 Mar 1998 | British | 76 years |
| Neil Stuart Cameron | Director | 7 Mar 2000 | 21 Apr 2008 | British | 76 years |
| Peter John Harrison | Director | 15 May 1995 | 12 May 1997 | British | 65 years |
| Robert Johnstone Mcarthur | Director | 14 May 2002 | 14 Jul 2007 | British | 74 years |
| Ronald Sutherland Macdonald | Director | 12 Nov 1997 | 31 Aug 2001 | British | 75 years |
| Ronald Sutherland Macdonald | Secretary | 12 Nov 1997 | 17 Nov 1997 | British | - |
| Ross Stirling | Director | 1 Sept 2007 | 13 Sept 2010 | British | 61 years |
| Susan Margaret Torrance | Director | 6 Oct 2003 | 26 Aug 2005 | British | 68 years |
| William Fulton Hepburn | Director | 10 May 2004 | 30 Nov 2008 | British | 76 years |