Craig T. Simmons, Ph.D., FTSE, is director of the National Centre for Groundwater Research and Training based at Flinders University, where is also Matthew Flinders Distinguished Professor of Hydrogeology and Schultz Chair in the Environment. Recognized for major national and international contributions to groundwater science, education, and policy reform, he is one of Australia’s foremost groundwater academics and has been a significant contributor to global advances in the science of hydrogeology for many years. Simmons serves as deputy chair of the Australian government’s Statutory Independent Expert Scientific Committee on Coal Seam Gas and Large Coal Mining Development, as well as deputy chair of the Australian Academy of Technological Sciences and Engineering’s Water Forum. He is also a member of the U.S. National Academies of Sciences, Engineering, and Medicine Roundtable on Unconventional Hydrocarbon Development. His work has been recognized by numerous national and international research and teaching awards including the Anton Hales Medal for outstanding contributions to research in the Earth sciences by the Australian Academy of Science, and he was named the 2015 South Australian Scientist of the Year. Simmons has served as an editor and associate editor for numerous major international journals including Groundwater®, Water Resources Research, Journal of Hydrology, Hydrogeology Journal, Environmental Modeling and Assessment, and Vadose Zone Journal.