Dr Gunner graduated from the University of Sydney, completing her hospital training at St Vincent’s Hospital and Sydney Hospital. Since then she has worked in both the public and private hospital system, with extensive time spent in Anaesthetics, Intensive Care, Cardiothoracic Intensive Care, and Cardio-Pulmonary Transplantation. She has also worked in General Medicine, Rehabilitation, Cardiology, Respiratory Medicine, and Palliative Care, and has been involved in medical education. Other interests include the history and philosophy of medicine.