Mary has been a Non-Executive Director of the Health Services Safety Investigations Body (HSSIB) Board since October 2023.
She is a lawyer by profession, starting her career as a criminal defence lawyer before moving onto specialising in human rights as Director of Law and Policy at Liberty, Director of Anti-Slavery International, Human Rights Advisor to the Foreign and Commonwealth Office and senior lawyer at the Equality and Human Rights Commission.
Mary was a Commissioner at the Independent Police Complaints Commission (IPCC) during a period of substantial change, leading investigations into police conduct, including deaths in custody, corruption and serious sexual assaults. She was the IPCC board lead for child sexual abuse and oversaw development of IPCC strategy and procedures and numerous investigations into police handling of child sexual abuse cases.
She is also former Chair of the National Referral Mechanism multi-agency panels, reviewing Home Office decisions on the status of trafficking and slavery victims.