Ray Wuolo is a vice president of Barr Engineering Co. in Minneapolis with over 30 years of experience as a computational hydrogeologist, specializing in numerical modeling of groundwater flow and solute transport. He is a licensed professional engineer and professional geologist in numerous states and Canadian provinces. Ray has served as associate editor of Ground Water, adjunct professor of hydrogeology at the University of St. Thomas, and on many academic and technical advisory boards. He received a BS in Geological Engineering from Michigan Tech and an MS from South Dakota School of Mines & Technology.