Career
Club career
Colusso played his early football for Marconi Stallions in the New South Wales State League. In 1975 he moved to Italy where he initially played youth team football for Torino. He then went on to play for Ivrea, becoming the first Australian to play professional football in Italy.
He moved to Pisa for the 1976/1977 season.
In 1977 he transferred to Arezzo where he played several seasons. He later played for Alessandria, Akragas Calcio and Castelfiorentino.
International career
In 1975 he made his only full international appearance for Australia in a match against China. Colusso had stints as an assistant manager at Reggina and Avellino.