Dr. Ivan Williams is a medical physicist, certified and registered, in the field of Radiation Oncology Medical Physics with the Australian College of Physical Scientists and Engineers in Medicine. Ivan has nearly thirty years’ experience in the field, evenly divided between clinical practice and government regulatory activities. Across his clinical work, Ivan has been deeply involved with the evaluation of long term impact of radiation exposure, the accuracy of dose calculation and measurement, and how to optimise the therapeutic outcome for a therapy regime.

Ivan trained in Medical Physics at the Peter MacCallum Cancer Institute in Melbourne before returning to research and completing a PhD in the application of Phase Contract Imaging to mammography. Following this Ivan moved to Ireland where he was initially a Principal physicist, then Acting Head of the Physics Department at St Luke’s Hospital in Dublin. In 2010, Ivan was recruited by ARPANSA to develop and deploy a national dosimetric auditing service for radiotherapy providers; the Australian Centre for Clinical Dosimetry, or ACDS. The ACDS has developed into a highly competent radiotherapy dosimetry auditing service, recognized internationally. Ivan was appointed to Branch Head for the Medical Radiations Safety within ARPANSA in 2015. He has responsibility for the Ionising Radiation Primary Standards Dosimetry Laboratory (PSDL), the ACDS and the Medical Imaging sections which collectively underpin the safe delivery of ionizing radiation for therapy and imaging across Australia. Ivan is a member of Committee 3: Medical Radiation, for the International Commission on Radiological Protection, ICRP.