The YMCA has been branded an unsafe child organisation after systemic failures allowed a paedophile to groom and molest 12 young boys in his care, according to a scathing report.

Jonathan Luke Lord was sentenced to 10 years' jail for the sexual abuse of boys aged between six and 11 during his employment at YMCA centres in Sydney's south.

No background checks done: Paedophile Jonathon Luke Lord.

The YMCA is the state's largest provider of care out of school hours and its failure to do proper background and reference checks allowed Lord to gain employment and access to victims, according to a royal commission report.

''The actions of YMCA Caringbah during and after Lord's offending are not those of a child safe organisation,'' the report states.