As at 30 June 2019, the office had 32 APS staff. The Inspector-General is supported by a Deputy Inspector-General and two Assistant Inspectors-General.
The Deputy Inspector-General has responsibility for legal and parliamentary matters, as well as finance and office management.
The Assistant Inspector-General Intelligence Oversight and Complaints Branch manages the teams responsible for inspection programs of six agencies within IGIS’s current jurisdiction, as well as complaints handling.
The Assistant Inspector-General Intelligence Oversight, Enabling Services and Legal Branch manages the teams responsible for engagement with the four additional agencies in IGIS’s proposed jurisdiction, as well as corporate, legal and policy services for the office.