When David Ututaonga first started work in Sydney's King Cross as a bouncer, he loved the social life and having a job where he was always talking to people.

Now, at the age of 53, he says the security industry no longer wants to employ "cavemen" like him - it prefers bouncers who are "young and funky".

"It's a new generation and a new clientele and they want someone who is more upmarket. The days are gone of the old caveman or the gentlemen who stood at the front door," he said.

David Ututaonga in his transition housing.

Since moving to Sydney from New Zealand in 1981, Mr Ututaonga was never short of work and enjoyed living in Sydney's Eastern Suburbs. He became homeless after losing his security job in 2014.