Dr Kath Smith

Chief Nuclear Officer

Assistant Director General

Dr Kath Smith is the Chief Nuclear Officer in the Australian Submarine Agency.Kath is a highly effective leader with extensive experience at the interface

Dr Gillian Hirth

Chief Executive Officer


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.