Dr. Hamilton received his doctorate degree from the University of Melbourne, Australia, in 1987, after earning undergraduate degrees in both chemistry and applied science. He served as a postdoctoral researcher at Flinders University of South Australia before joining the United Nations (1988-95) as a Group Leader in the International Atomic Energy Agency’s Monaco Laboratory (IAEA-MEL). In 1996, Dr. Hamilton joined the Lawrence Livermore National Laboratory under the UC Berkeley Scholar Program and has held positions as the Deputy Director of the Marshall Islands Program, as Group Leader of Environmental Measurements and Characterization Group–Health and Ecological Assessments Division, and as Deputy Division Leader of the Environmental Science Division. Dr. Hamilton has over 30 years of international experience solving problems related to the health and ecological impacts of radionuclide releases to the environment. He has been involved in studies in the Russian Arctic, Mediterranean Sea, Adriatic Sea, and at nuclear test sites in the Aleutian Islands, the Marshall Islands, French Polynesia, and at Maralinga in South Australia. Dr. Hamilton is currently serving (2000–present) as the Scientific Director, Marshall Islands Dose Assessment and Radioecology Program at the Lawrence Livermore National Laboratory.