| Andrea Alessandro Orlandi | Director | 20 Jul 2022 | 22 May 2023 | British | 55 years |
| Cheryl Maher | Director | 2 Jul 2021 | 9 Jul 2025 | Irish | 39 years |
| Geoffrey Ross Willetts | Director | 19 Jul 2017 | 21 Dec 2017 | New Zealander | 46 years |
| Geoffrey Ross Willetts | Director | 23 Jul 2020 | 27 Jun 2025 | British | 46 years |
| Mark John Packer | Director | 6 Jun 2018 | 23 Jul 2020 | British | 61 years |
| Matthew Hele | Director | 22 May 2023 | 3 Jun 2025 | British | 53 years |
| Raymond Bradley Thomas Boswell | Director | 21 Dec 2017 | 11 May 2018 | Australian | 53 years |
| Roderick Carnan | Director | 21 Dec 2017 | 20 Jul 2022 | British | 70 years |
| Simon Thomson Leckie | Director | 23 Jul 2020 | 4 Feb 2022 | Australian | 64 years |
| Thomas Lachlan Mackellar | Director | 19 Jul 2017 | 23 Jul 2020 | Australian | 44 years |
| Thomas Oliver Jackson | Director | 21 Dec 2017 | 19 Nov 2018 | British | 45 years |
| Thomas Oliver Jackson | Director | 23 Oct 2019 | 22 May 2023 | British | 45 years |
| Vanisha Ashok Thakrar | Director | 19 Nov 2018 | 28 Jun 2019 | British | 39 years |
| Vichada Chuangdumrongsomsuk | Director | 28 Jun 2019 | 2 Jul 2021 | American | 35 years |