During his school playing days, Callum was scouted to represent Ireland U18s. Upon leaving school and impressing scouts when wearing the Irish green colours, Callum pursued his ambition to play professional rugby by signing for European Championship side - Connacht Rugby. Later, moved back to England to play for Bury St Edmund's in RFU National League 2 where he continued to impress, leading to a contract opportunity with Championship side at the time - Richmond RFC, to continue his rugby career alongside his University studies.

Callum is currently playing for Richmond RFC as a hooker.