The Rosehill College Board of Trustees, established under the Education Act, is the controlling authority of the school.The Board has responsibility for:
- Control and management of the school.
- Appointment and suspension of teachers and other staff.
- Maintenance of grounds, buildings, services and equipment.
- Expenditure of the finance allocated to the school by way of bulk funding.
- Suspension and exclusion of pupils.
The constitution of the Board provides for:
- 6 members elected by parents of College pupils
- 1 member elected by teaching staff
- 1 member elected by students
- Up to 3 members who may be co-opted onto the Board.
- The Board elects a chairman and deputy chairman from amongst its own members.