The Italian migrant played a key role in building United Construction and Monadelphous into two of Australia's most successful engineering and construction contractors.
In 1969, John (Giovanni) Rubino, John (Giancarlo) Trettel, Sam (Santino) Castelli and Charlie (Carmelo) Bontempo were among the thousands of young migrants toiling in workshops and construction sites across Australia.
Monadelphous Group is one of Western Australia's biggest and most successful engineering construction companies, but it wouldn't be running today if it hadn't been rescued by the co-founders of United Construction.
Property investment and property development have been the main commercial pursuits of John Trettel, Sam Castelli and Charlie Bontempo since they left United Group.
The year 1991 was a bad time to be in business. It was the year Australia had “the recession we had to have”, to quote the immortal words of then Prime Minister Paul Keating.