Dr. David McCallen is a Senior Scientist in the Energy Geosciences Division at Lawrence Berkeley Lab and Professor of Civil and Environmental Engineering at the University of Nevada, Reno. Dr. McCallen’s research interests range from high performance simulations to experimental testing on earthquake simulation shake tables. Dr. McCallen has worked in a number of positions related to the UC National Laboratories at Lawrence Livermore Lab and Lawrence Berkeley Lab. His career started in the Structural and Applied Mechanics Group at Livermore where he developed computational software and performed advanced simulations on complex structures. His responsibilities eventually extended to leadership of major programs including Engineering Division Leader for the National Ignition Facility, and Deputy Principal Associate Director for Global Security. Dr. McCallen maintains an active research program and is currently the Principal Investigator for a DOE Exascale Application Development project focused on massively parallel simulations for regional scale earthquake risk assessments.