Crown bouncer Quoc Hai Tran might have attacked a mother of four enjoying a night out at the casino but he loved his job and wanted to keep working in the security industry, a court has heard today.

Defence barrister Lachlan Carter told the Supreme Court that Tran, 35, had simply been overzealous when doing his job and not involved in a pre-meditated act of thuggery.

Mr Carter said Tran, who was born on a fishing boat travelling from Vietnam to Australia in 1978, had been doing nothing more than carrying out his duties according to his training.

He said the attack on Olivia Ferguson should be viewed as an "isolated aberration".