| Albert Scheuer | Director | 7 Aug 2007 | 13 Jun 2008 | German | 68 years |
| Benedikt Zinn | Director | 24 Jul 2021 | 30 Oct 2025 | German | 43 years |
| Benjamin John Guyatt | Director | 1 Apr 2010 | 1 Jun 2011 | British | 50 years |
| Bibi Rahima Ally | Director | 29 Jun 2007 | 10 Jul 2007 | British | 65 years |
| Carsten Matthias Wendt | Director | 1 Dec 2016 | 6 Sept 2021 | German | 49 years |
| Christian Leclercq | Director | 12 Jun 2008 | 31 Mar 2010 | Belgian | 60 years |
| Christopher James Ward | Director | 1 Feb 2020 | 30 Oct 2025 | American | 53 years |
| Daniel John Cooper | Director | 1 Jan 2016 | 31 Jan 2019 | Australian | 55 years |
| Daniel Michael Harrington | Director | 16 Jun 2010 | 16 Jun 2010 | Us Citizen | 73 years |
| Daniel Michael Harrington | Director | 16 Jun 2010 | 15 Oct 2015 | Us Citizen | 73 years |
| David Jonathan Clarke | Director | 1 Jun 2011 | 1 Dec 2016 | British | 51 years |
| Geoffrey Charles Stretton | Director | 7 Aug 2007 | 13 Jun 2008 | British | 73 years |
| Helmut Karl Fischer | Director | 14 Sept 2010 | 31 Aug 2013 | German | 55 years |
| Henner Bottcher | Director | 20 May 2015 | 23 Jul 2021 | German | 50 years |
| Ian Leonard Flavell | Director | 10 Jul 2007 | 13 Jun 2008 | British | 70 years |
| James Kennison Kitzmiller | Director | 11 Sept 2009 | 31 Mar 2010 | Us Citizen | 83 years |
| Jonathan Peter Morrish | Director | 2 Dec 2015 | 31 Jan 2020 | British | 55 years |
| Lorenz Nager | Director | 10 Jul 2007 | 31 Aug 2021 | German | 65 years |
| Malcolm Roger Pye | Secretary | 10 Jul 2007 | 13 Jun 2008 | British | - |
| Martin Robert Henderson | Nominee Secretary | 28 Jun 2007 | 10 Jul 2007 | British | - |
| Michael Anthony Eberlin | Director | 10 Jul 2007 | 13 Jun 2008 | British | 63 years |
| Nicholas Arthur Dawe Benning-prince | Director | 15 Oct 2013 | 16 Sept 2025 | British | 51 years |
| Patrick Joseph O'shea | Director | 13 Jun 2008 | 31 Dec 2015 | British | 67 years |
| Ralph Dominik Von Achten | Director | 1 Jan 2009 | 31 Mar 2016 | German | 60 years |
| René Samir Aldach | Director | 1 Sept 2021 | 16 Sept 2025 | German | 46 years |
| Richard Robert Gimmler | Director | 13 Jun 2008 | 30 Dec 2009 | British | 58 years |
| Robert Charles Dowley | Director | 9 Dec 2013 | 16 Sept 2025 | British | 53 years |
| Roger Thomas Virley Tyson | Secretary | 31 Jul 2008 | 11 Apr 2016 | British | - |
| Seyda Pirinccioglu | Director | 19 Jul 2010 | 13 Mar 2015 | Turkish | 54 years |
| Simon Lloyd Willis | Director | 28 Jan 2019 | 16 Sept 2025 | British | 60 years |
| Timothy William Mchugh | Director | 13 Jun 2008 | 3 May 2010 | American | 71 years |
