Justin holds an MSc and BSc in environmental engineering from ETH Zurich and North Carolina State University. His academic training specialized in ecological systems design (including mass flow and life cycle analysis), air quality control, and waste management, including a focus on the transport of chemicals within international food trade. He then worked as a research scientist at ETH Zurich focusing on modeling the emissions and fate of fluorinated substances in the environment, mapping the life cycles of endocrine disrupting chemicals, and supporting projects focused on strengthening international science-policy communication. He is a co-author of multiple reports for the United Nations Environment Programme on chemicals and waste, has supported scientific discussions within the Stockholm Convention on Persistent Organic Pollutants, and developed university teaching curriculum on the environmentally oriented design of chemical products and processes. Since January 2019 he has been working with the Food Packaging Forum.