After actively seeking an acting career, he performed in various Crawford Productions including Division 4 and Homicide.
Cronin appeared as motorcycle policeman Gary Hogan in the Crawford Productions drama Matlock Police (1971–1976), followed by its spin-off Solo One (1976).
In 1986 Cronin led a consortium with Christopher Skase which was awarded the inaugural licence for the Brisbane Bears in the then-Victorian Football League.
[8][10] After playing several small roles, in 1971, Cronin appeared as motorcycle policeman Gary Hogan in the Crawford Productions drama Matlock Police (1971–1976).
[9] In 1998 Cronin replaced Channel Nine voice-over man Pete Smith as the alternative co-host on radio 3AW's Nightline and Remember When programs.
[12] In 2008, he was the host of the fourth series of Discover Downunder, which explores the caravan and camping industry in Australia.
[4] In 1986 he led a consortium with Christopher Skase which was awarded the inaugural licence for the Brisbane Bears in the then-Victorian Football League (VFL).