| Andrew David Richard Hastings | Director | 18 Feb 2014 | 15 Jun 2018 | British | 65 years |
| Angela Sarah Helen Fletcher | Secretary | 18 Feb 2014 | 23 Apr 2014 | - | - |
| David Eric Chenier | Director | 18 Feb 2014 | 1 Aug 2015 | American | 64 years |
| David Grimshaw | Secretary | 9 Sept 2014 | 18 Dec 2018 | - | - |
| David James Lynch | Director | 18 Dec 2018 | 31 Dec 2018 | British | 63 years |
| Dominic Edward Macklon | Director | 1 Aug 2015 | 5 Jan 2017 | British | 57 years |
| Doris Friederike Reiter | Director | 7 Feb 2022 | 26 Jun 2023 | Austrian,american | 56 years |
| Ifeatu Chukwuemeka Emembolu | Director | 9 Oct 2020 | 7 Feb 2022 | British | 52 years |
| Jean-francois Jacques Basile Pepin | Secretary | 18 Feb 2014 | 14 Aug 2014 | - | - |
| Joseph Anthony Farrell | Secretary | 19 Mar 2018 | 18 Dec 2018 | - | - |
| Katherine Susan Simpson | Director | 15 Jun 2018 | 18 Dec 2018 | British | 65 years |
| Michael Don Wright | Director | 18 Feb 2014 | 29 Oct 2015 | American | 62 years |
| Peter William Anderson Miller | Director | 18 Dec 2018 | 9 Oct 2020 | British | 58 years |
| Ross Graham Stalker | Director | 31 Oct 2015 | 25 Sept 2018 | British | 62 years |
| Russell Scott | Director | 25 Sept 2018 | 18 Dec 2018 | British | 53 years |
| Terri Gay King | Director | 5 Jan 2017 | 18 Dec 2018 | American | 65 years |