Dr. Uisung Lee is a Principal Energy Systems Analyst in the Systems Assessment Center of the Energy Systems and Infrastructure Analysis Division at Argonne National Laboratory. His expertise mainly focuses on conducting life-cycle analyses (LCAs) of various energy systems to evaluate the environmental impacts such as life-cycle greenhouse gas emissions, fossil fuel use, air pollutant emissions, and water consumption. The systems include but are not limited to sustainable aviation fuels (SAFs), CO2 utilization (e-fuels or power-to-liquid), and waste-to-energy pathways. He supports the development of the GREET (The Greenhouse gases, Regulated Emissions, and Energy use in Technologies) model, an LCA model developed by Argonne that is structured to systematically examine the life-cycle energy use and emissions. He is a nominated expert to the International Civil Aviation Organization’s (ICAO) Fuels Task Group (FTG) for evaluating core LCA values of aviation fuels.