Battelle Senior Research Leader and Institute Fellow Neeraj Gupta likes to go with the flow—the subsurface flow, that is. Over the last two decades, he has built his career around subsurface geology, hydrogeology and hydrodynamics. He is now one of the world’s leading authorities on deep geological carbon capture and storage (CCS). The work Neeraj and his team are doing has important implications for the oil & gas industry and for the environment. Using CO2 for enhanced oil recovery can be an option to reduce CO2 emissions, especially when compared to primary oil production without CO2. Because of the link between carbon emissions and climate change, the EPA has made carbon management a priority for the energy sector. His work on environmental technology services includes fate and transport of contaminants, evaluation of remediation technologies and risk assessment projects for the Air Force, Navy, EPA, DOE and private and international clients. Past projects include evaluation of subsurface permeable reactive barriers and assessment of remediation technologies at Cape Canaveral. He now provides technical and program development leadership for Battelle’s carbon management and subsurface exploration work. He is a leading authority on integrated projects for CO2 storage and utilization including characterization and exploration of deep geologic reservoirs and caprocks, monitoring and regulatory issues.