Dr. John C. Wagner is the director of Domestic Programs in the Nuclear Science and Technology Directorate and the director of the Technical Integration Office for the DOE-NE Light Water Reactor Sustainability program at Idaho National Laboratory (INL). He has more than 20 years of experience performing research and managing and leading research and development projects, programs, and organizations. Wagner received a B.S. in nuclear engineering from the Missouri University of Science and Technology in 1992 and M.S. and Ph.D. degrees from the Pennsylvania State University in 1994 and 1997, respectively. Following graduate school, Wagner joined Holtec International as a principal engineer, performing criticality safety analyses and licensing activities for spent fuel storage pools and storage and transportation casks. Wagner joined the Oak Ridge National Laboratory (ORNL) as an R&D staff member in 1999, performing research in the areas of hybrid (Monte Carlo/deterministic) radiation transport methods, burnup credit criticality safety, and spent nuclear fuel characterization and safety. While at ORNL, Wagner held various technical leadership positions, including Technical Lead for postclosure criticality in support of DOE OCRWM’s Lead Laboratory for Repository Systems, Radiation Transport Methods Deputy Focus Area Lead for the Consortium for Advanced Simulation of Light Water Reactors (CASL), and National Technical Director of the DOE Office of Nuclear Energy’s Nuclear Fuels Storage and Transportation Planning Project. Wagner also held various management positions, including Group Leader for the Criticality and Shielding Methods and Applications, Radiation Transport, and Used Fuel Systems groups. In 2014, Wagner became Director of the Reactor and Nuclear Systems Division (RNSD), with responsibility for management direction and leadership to focus and integrate the seven RNSD R&D groups (Advanced Reactor Systems and Safety, Nuclear Data and Criticality Safety, Nuclear Security Modeling, Radiation Transport, Reactor Physics, Thermal Hydraulics and Irradiation Engineering, and Used Fuel Systems) and the Radiation Safety Information Computational Center. Wagner joined INL in his current position in February 2016, with responsibility for technical and strategic leadership in several key areas and a principal role in the transformation of MFC to a more effective R&D organization. Wagner is a Fellow of the American Nuclear Society and recipient of the 2013 E. O. Lawrence Award. Wagner has authored or co-authored more than 170 refereed journal and conference articles, technical reports, and conference summaries. He was the original developer of the A3MCNP and ADVANTG codes and led the development of the CADIS and Forward-Weighted CADIS hybrid transport methods.