| Andrew Howie | Director | 4 Aug 2011 | 18 Oct 2012 | British | 71 years |
| Barbara Valerie Arnold | Director | 13 Dec 2006 | 7 Nov 2007 | British | 67 years |
| Barbara Valerie Arnold | Secretary | 17 Sept 2007 | 22 Jun 2009 | British | - |
| Brison Richard Ellinghaus | Director | 7 Nov 2007 | 3 Aug 2010 | American | 67 years |
| Christoph Rene Manser | Director | 22 Aug 2014 | 28 Jan 2019 | Swiss | 55 years |
| Constantin Dogos-docovitch | Director | 22 Aug 2014 | 6 Feb 2020 | French | 46 years |
| Donald Todd Lehman | Director | 3 Aug 2010 | 30 Sept 2013 | American | 61 years |
| Donald Todd Lehman | Secretary | 30 Apr 2009 | 30 Sept 2013 | American | - |
| Edward Childs Hall | Director | 30 Jun 2006 | 13 Mar 2009 | Usa | 67 years |
| Elenise Aquino Paz | Director | 3 Aug 2010 | 22 Aug 2014 | Brazilian | 55 years |
| Faheem Zaka Sheikh | Director | 1 May 2023 | 29 Apr 2025 | British | 42 years |
| Gabriel Vaca | Director | 2 Dec 2009 | 4 Aug 2011 | American | 60 years |
| Harriet Evans | Secretary | 10 Dec 2004 | 17 Sept 2007 | British | - |
| Javier Francisco Serrano Alonso | Director | 17 Mar 2017 | 26 Apr 2022 | Spanish | 48 years |
| John Nelson Bottomley | Director | 13 Mar 2009 | 6 Sept 2013 | Italian | 59 years |
| Julien Delphin Henri Chetrit | Director | 6 Feb 2020 | 6 Mar 2023 | French | 38 years |
| Keith Lambert Oberg | Director | 30 Jun 2006 | 22 Nov 2009 | Usa | 67 years |
| Laurence Jon Fumagalli | Director | 22 Aug 2014 | 17 Mar 2017 | British | 54 years |
| Magnus William Lachlan Macintyre | Director | 13 Dec 2004 | 19 Dec 2008 | British | 55 years |
| Mark Edward Miller | Director | 18 Oct 2012 | 22 Aug 2014 | American | 65 years |
| Michael Davies | Director | 10 Dec 2004 | 19 Dec 2008 | British | 71 years |
| Peter Barrett | Director | 30 Jun 2006 | 13 Dec 2006 | British | 71 years |
| Peter James Mchale | Director | 22 Aug 2014 | 31 Jul 2015 | Irish | 56 years |
| Robert John Lewis | Director | 13 Dec 2004 | 30 Jun 2006 | British | 57 years |
| Roger Paul Casement | Director | 6 Sept 2013 | 22 Aug 2014 | Irish | 63 years |
| Stephen Bernard Lilley | Director | 22 Aug 2014 | 1 May 2023 | British | 58 years |
| Thomas Hornby Graham Cooper | Director | 13 Dec 2004 | 30 Jun 2006 | British | 76 years |
| Tihomir Mladenov | Director | 30 Sept 2013 | 22 Aug 2014 | Bulgarian | 50 years |
| Tihomir Mladenov | Secretary | 30 Sept 2013 | 22 Aug 2014 | - | - |