Charles D. Shackelford is Professor and Head of the Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, Colorado, USA, where he has been a faculty member since 1988. Prof. Shackelford’s research is focused primarily on evaluating flow and transport of hazardous liquids and contaminants through engineered containment barriers, and he has 38 years of experience pertaining to the geoenvironmental aspects of waste management and environmental remediation. He has served as an Editor for ASCE’s Journal of Geotechnical and Geoenvironmental Engineering and Elsevier’s Journal of Hazardous Materials, and currently serves as Co-Editor for Elsevier’s Geotextiles and Geomembranes and Associate Editor for the Canadian Geotechnical Journal. Prof. Shackelford also was past chair of the Geoenvironmental Engineering Committee (GEC) of ASCE’s Geo-Institute, and past co-chair for the Environmental Geotechnics Committee TC215 of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), and he currently is a member of both the GEC and TC215. Dr. Shackelford’s career contributions to the field of Environmental Geotechnics were recognized through his receipt in 2013 of the inaugural R. Kerry Rowe Honorary Lecture for Environmental Geotechnics from the ISSMGE.