Allen M. Shapiro is a Senior Research Hydrologist with the National Research Program of the U.S. Geological Survey in Reston, Virginia. His research focuses on the development of field techniques and methods of interpreting geologic, geophysical, hydraulic, and geochemical information in the characterization of fluid movement and chemical transport in fractured rock from meters to kilometers. Shapiro’s research has focused on a wide range of geologic environments, including crystalline and sedimentary rock, and carbonate aquifers that have undergone karstification. His research has been applied in issues of water supply, geotechnical engineering, waste isolation, and groundwater contamination and restoration.