Mary-Ann was admitted as a solicitor in New South Wales in 2015 and has been a member of John de Mestre & Co, Sydney since her admission. Previously, Mary-Ann was a Tipstaff to the Honourable Justice Geoff Lindsay of the Supreme Court of New South Wales. Mary-Ann is currently an Adjunct Fellow in the School of Law at Western Sydney University. Mary-Ann has acted in a number of matters in varied areas of law with a special interest in civil litigation in relation to sports law and estates.