Rumbelow operated his own production company in Toronto, Ontario, Canada, Renegade Motion Pictures, with his wife, Rachel, until his sudden death from sepsis on 27 February 2016.

At age 16 he took a summer job as a stagehand at the Bristol Old Vic and was promoted to technical stage manager within six weeks.

[3] With his career in theatre started at Bristol Old Vic he moved to London aged eighteen and worked with an experimental unit of the Royal Shakespeare Company.

[4] He adapted Christopher Marlowe's Dr. Faustus into a 60-minute play that was so successful; he began the show in 1971 and toured all over the world with it until the late nineties.

[7] Renegade Motion Pictures was founded by Rumbelow and credits include feature films, television, commercials and music videos.