A FORMER Ballarat man has been registered as a sex offender for life and jailed for molesting two young brothers almost a decade ago.In the County Court at Ballarat yesterday, Glen Francis Roberts, 51, was convicted and sentenced to three years' jail.Last week he pleaded guilty to two counts of committing an indecent act with a child under 16. The charges related to the sexual assault of two brothers, who cannot be named, on two occasions near Ballarat in 2000.The sentence is Roberts' second jail term in four years for child sex offences. In 2005, he was sentenced to 12 years' imprisonment for the sexual assault of children in South Australia.These offences took place between 2001 and 2004.The court had been told Roberts inappropriately touched one of the boys while his brother slept in the same room. Roberts told the boy, who tried to push him away, that he would kill him if he told anyone about the incident.In a separate incident, Roberts inappropriately touched the other boy and told him he would punch his head in if he told anyone about it.Judge Jeanette Morrish, in sentencing Roberts, described him as a serious sex offender. She said it was vital to protect the community from this type of behaviour."Both (victims) were under the age of 10. You were in a position of trust and grossly abused it," Judge Morrish said.She said Roberts must be registered as a sex offender for the rest of his life because he had previously committed eight sexual offences against a child.Judge Morrish directed that one year of the jail term be served concurrently with Roberts' present sentence.He will be eligible for parole in May, 2013.