Brett was born and raised in Belfast were he started playing football at the age of 5. Brett began his career in football as a striker before being moved to centre midfield, at the age of 13 it was clear that Brett was to become a goalkeeper. He played for Northern Ireland throughout his youth including playing within the European Championship. At the age of 16 Brett signed a 3 year deal with Motherwelll before joining Dundee United under a 2 year contract.
Brett is currently on emergency loan with Clyde.