| Johanna Peta Churchill | 26 July 2019 | 16 September 2021 |
| Maria Colette Caulfield | 17 September 2021 | 8 July 2022 |
| Neil John O'Brien | 8 September 2022 | |
| Claire Coryl Julia Coutinho | 21 September 2022 | 27 October 2022 |
| Nicholas Francis Markham, Baron Markham | 22 September 2022 | |
| Maria Colette Caulfield | 27 October 2022 |