​A convicted sex offender who has faced allegations of domestic violence from two ex-partners and one of his children has been cleared to run a childcare business, after the Supreme Court dismissed an appeal by the NSW Children's Guardian.

The man, whose name has been suppressed for legal reasons, failed to pass a working with children check after he was found to have committed several serious sexual offences as a 15-year-old boy.

A convicted sex offender has won a legal battle that will allow him to run childcare centres. Credit:Phil Carrick

During a two-month spree in 1982, he variously grabbed a 23-year-old woman's crotch, grabbed the crotch and breasts of a 29-year-old woman and exposed to her his penis and pulled up the T-shirt of a 20-year-old woman, grabbed her breast and invited her to perform fellatio.

He also approached a 15-year-old girl and asked her to sit on his penis and entered another woman's car without her consent, ignored her requests to get out and grabbed her breasts, pushing off her bikini top in the process.