He was formerly an Oak Ridge Institute of Science and Education (ORISE) Postdoctoral Research Fellow at the U.S. Environmental Protection Agency (EPA), National Risk Management Research Lab (NRMRL), Sustainable Technology Division (STD), in Cincinnati, Ohio. His research focuses on the life cycle sustainability of emerging technologies, such as biofuels, green buildings, and consumer products. His tools of research include life cycle assessment (LCA), industrial ecology, material flow analysis, energy efficiency, market diffusion models, reuse and recycling, and sustainable development.