| Adam Cade Nancarrow | Director | 21 Sept 2017 | 19 Dec 2019 | Australian | 51 years |
| Andrew Horsley Clifford Hartley | Director | 19 Oct 2018 | 19 Dec 2019 | British | 68 years |
| Christopher Michael Archer | Director | 21 Sept 2017 | 25 Apr 2018 | British | 43 years |
| Fiona Margaret Stewart | Director | 21 Jul 2022 | 13 Dec 2024 | British | 55 years |
| John Mark Isherwood | Director | 21 Sept 2017 | 27 Sept 2018 | British | 54 years |
| Mark Jonathan Dooley | Director | 21 Sept 2017 | 19 Oct 2018 | Australian | 64 years |
| Matthew John Edgar | Director | 19 Oct 2018 | 30 Apr 2020 | Australian | 41 years |
| Peter Richard Andrew Knott | Director | 29 Apr 2020 | 21 Jul 2022 | British | 62 years |
| Philipp Ulrich Rasi De Mel | Director | 13 Dec 2024 | 1 Sept 2025 | British | 53 years |
| Stephen Leslie Ray | Director | 19 Dec 2019 | 8 Jun 2021 | British | 53 years |