| Title | Department Secretary |
| Start Date | 2017-12-20 |
| End Date | 2023-11-27 |
| Is Current | no |
| Notes | Home Affairs secretary Michael Pezzullo has been fired from his role over covert dealings with lobbyists and secret efforts to gain and exert political influence during the terms of the Turnbull and Morrison governments, the first time a department head has been dismissed for misconduct. |