A/Prof Dion Forstner is a conjoint Associate Professor with UNSW and has worked for GenesisCare in NSW since 2018. Dion is based at St Vincent’s Hospital and Macquarie University Hospital and prior to this he was Head of Department of Radiation Oncology in South Western Sydney Local Health District for 9 years. His clinical focus is in the management of head and neck, and skin cancers. He is site director at GenesisCare, St Vincent's Clinic in Darlinghurst, NSW. He is the Acting Director of Cancer Services with St Vincent’s Health Network Sydney based at the Kinghorn Cancer Centre.

From 2014 to 2018 Dion headed up the professional body for radiation oncologists in Australia and New Zealand as Dean of Faculty of Radiation Oncology (FRO) at the Royal Australian and New Zealand College of Radiologists (RANZCR). In that role, he had a strong interest in quality, workforce, education and advocacy. He remains involved with RANZCR as Chair of the MBS working group – leading implementation of the completely new MBS schedule for radiation oncology and he is involved in training as a clinical supervisor, an assessor for accreditation of training sites and as an assessor of international medical graduates. Dion is the Immediate Past President of the Clinical Oncology Society of Australia (COSA). He sits on the Boards of the Royal Australian and New Zealand College of Radiation Oncologists and Head and Neck Cancer Australia and is a member of the NSW Government’s Radiation Advisory Council. He was a member of Cancer Australia’s Australian Cancer Plan Advisory Group.