An independent review said Shabir Ahmed, who led the sexual abuse ring in Rochdale, was seconded to the Oldham Pakistani Community Centre during his time working for the local authority.
Despite multiple concerns being raised about him and his arrest for the sexual assault of children, police failed to tell his employers.
“If this had happened, it may have potentially avoided the tragic abuse of other children…” the report states, citing “serious multiple failures” by both GMP and the local authority.
Ahmed, identified only as “Offender A” in the report, is now serving a 22-year jail sentence.
The revelation featured in a report that concluded police and local councils in Oldham failed to protect some children from grooming and sexual exploitation.
The review found that “some children had been failed by the agencies that were meant to protect them because child protection procedures had not been properly followed”, but said there was no evidence of a cover-up by the authorities.
The report also details how a 12-year-old girl who was raped multiple times in one day was severely let down by the police and Oldham Council.