He was born in Chingford, London and trained at the Royal Ballet School for 3 years and then at Italia Conti Academy for a further 3 years as a singer/dancer/actor. Rass acted in numerous commercials and performed modelling work. As a performer, he starred in the West End musicals Starlight Express and Cats, and played leading roles in the UK tours of 42nd Street and What A Feeling before making his name as a songwriter.
Writing with Mike Stock, formerly of Stock Aitken Waterman, Sandy co-wrote and co-produced "The Fast Food Song" by The Fast Food Rockers