| Alexander Rupert Felsing Von Der Vellen | Director | 7 Oct 2016 | 18 Oct 2016 | British | 60 years |
| David Christopher Harbord | Director | 23 Jun 2017 | 25 Mar 2019 | British | 65 years |
| Francisco Guadamillas Cortés | Director | 15 Jun 2016 | 16 Oct 2016 | Spanish | 67 years |
| Georg Haub | Director | 15 Jun 2016 | 7 Oct 2016 | German/ American | 64 years |
| John Bothe | Director | 4 Apr 2015 | 23 Jun 2017 | German | 36 years |
| Mark Christian David Swanwick | Director | 27 Jul 2015 | 25 Oct 2018 | British | 73 years |
| Mark Edward Thistlethwayte | Director | 23 Jun 2017 | 14 Nov 2018 | British | 62 years |
| Robert Haub | Director | 24 Oct 2014 | 23 Jun 2017 | German | 35 years |
| Rory Paterson | Director | 9 May 2014 | 19 Jul 2017 | British | 35 years |
| Sean O'farrell | Director | 18 Jun 2014 | 31 Oct 2016 | Irish And German | 37 years |