Graeme Mundine grew up in Bundjalung, Northern NSW. The youngest of 11 children, he was educated by the Marist Brothers and entered the Marist noviciate upon finishing school. For 20 years, Graeme was a teacher at Marist Schools. In 1990, Graeme became Chair and Executive Officer of the National Aboriginal and Torres Strait Islander Catholic Council (NATSICC). In 1999, Graeme left the Marist Brothers. He later worked with the National Council of Churches in Australia (NCCA) for eight years. Graeme married Gabrielle Russell Mundine in 2011. Graeme is now Executive Officer of the Aboriginal Catholic Ministry in the Sydney Archdiocese.