T.D. MacDonald grew up on the east coast of Canada in the small town of St. Andrews, New Brunswick before heading west to the University of Waterloo where he completed a B.Sc. in Biochemistry. He then spent a few years in Toronto developing cancer nanomedicines under the supervision of Dr. Gang Zheng, earning an M.Sc. in Pharmaceutical Sciences from the University of Toronto. Looking for something new to explore and intrigued by the intertwined technical and political aspects of nuclear science, he decided to change fields and pursue a Ph.D. at NSE. His masters thesis focused on radiation detectors and interrogation systems for cargo security. His Ph.D. work is focused on the policy aspects shared by biological and nuclear weapons. When not in the lab, T.D. can be found running, playing video games, volleyball, softball, or competing with the NSE intramural air pistol team.