For most of her working life, over 30 years, Margaret Cunneen SC was a Crown Prosecutor in NSW. She prosecuted many noted cases of murder, pedophilia and gang rape and was appointed Senior Counsel in 2007. As a specialist in child sexual assault law, she was appointed Commissioner of the NSW Special Commission of Inquiry into child sexual abuse allegations in the Catholic Diocese of Maitland-Newcastle in 2012, reporting to the Governor in 2014. Since 2019 she has been in private practise as a barrister, representing people charged with criminal offences. She has a Bachelor of Laws (UTS) and a Master of Laws (Syd).
She is the mother of three adult sons and a new grandmother. She is a 4th dan black belt in taekwondo and has been training in boxing for the last 8 years.