Dr Gillian Hirth
Chief Executive Officer
ARPANSA
Dr Gillian Hirth was appointed as Chief Executive Officer of ARPANSA in March 2022.
Dr Scott O. Schwahn
Senior Health Physicist
Oak Ridge Laboratory
Dr. Scott O. Schwahn has been a senior health physicist at the United States Department of Energy’s (U.S. DOE) Oak Ridge National Laboratory
Helen Cassidy
Manager – Operations & Inventory
Australian Radioactive Waste Agency
Helen Cassidy joined the Australian Radioactive Waste Agency (ARWA) in November 2023 and works in a senior management role as Manager – Waste Operations & Inventory.
Loch Castle
Acting Assistant Director General Nps Governance Authority
Australian Submarine Agency
Loch Castle is a former senior regulatory officer from ARPANSA with over 20 years of experience covering the disciplines of nuclear safety, nuclear security and nuclear emergency preparedness and response.
