Thomas Maddock is the head of the Department of Hydrology and Water Resources at the University of Arizona, the former deputy director of the Science and Technology Center for Sustainability of Semi-arid Hydrology and Riparian Areas (SAHRA), and the co-director of the University of Arizona Research Laboratory for Riparian Studies. He is also a professor of hydrology and water resources. Dr. Maddock has been a member of several editorial boards and contributes his time to various committees in his field such as the Hydrology Committee for the Lower Rio Grande Adjudication, and the Texas-New Mexico Settlement Commission. In addition, he has written extensively about hydrology in various publications such as the Hydrogeology Journal, Groundwater, Rivers, Water Resources Bulletin, and Water Resources Research. Currently, he supervises Ph.D. and Master Students in hydrology. He has won several honors and awards including: the Joseph Wood Krutch Award for Environmental Service from The Nature Conservancy, and the Udall Fellowship from the Udall Center for Studies in Public Policy. Dr. Maddock received his B.S. in mathematics at the University of Houston, his M.S. in applied mathematics from Harvard University, and his Ph.D. in environmental engineering from Harvard University.