The Development Office supports the School in a number of ways. It provides assistance to all parent and sporting clubs, support for activities of the Firbank Foundation: friend raising functions, sponsorship, capital appeals, Annual Giving and the Bequest Program. The Development Office works closely with the Firbank Old Grammarians Association particularly in regard to the extensive reunion program.

The Development Office is located on the Senior School campus in Brighton. The School Community Events Co-ordinator is Ms Angela Minahan. She can be contacted on 9591 5148.