Barbara Sherwood Lollar, CC, FRS, NAS, NAE, FRSC, FRCGS is a University Professor in Earth Sciences and Dr. Normal Keevil Chair at the University of Toronto. She is Co-Director of the CIFAR program Earth 4D – Subsurface Science and Exploration

Sherwood Lollar is an expert on the interface of the carbon cycle and hydrogeology, including the origin and fate of carbon-bearing fluids and gases including native H2, He, CO2, and CH4, deep subsurface microbiology, and the remediation of surface drinking water supplies. She is a recipient of the 2012 Eni Award for Protection of the Environment, 2012 Geological Society of America Geomicrobiology and Geobiology Prize, the 2016 NSERC John Polanyi Award, 2018 Logan Medal of the Geological Association of Canada, 2019 NSERC Herzberg Gold Medal, 2019 C.C. Patterson Award in environmental geochemistry. Recently she was recipient of the 2020 Canada Council Killam Prize for Natural Sciences, and 2021 RCGS Massey Medal.