Paul Yarrington is Manager of the Code Development and Applications Group in the Computation, Computers, Information and Mathematics Center at Sandia National Laboratories. He has responsibility for organizing and managing the Computer Science Research Foundation activities at Sandia, under which R&D studies are conducted on advanced computer architectures, methods, and enabling technologies. His technical work has been in the area of development and application of computational methods for nuclear and conventional weapons effects analyses. His work in this area has been published in various classified and unclassified journals and reports. He joined Sandia National Laboratories in 1974, after earning BS and Ph.D. degrees in Theoretical and Applied Mechanics and an MS degree in Nuclear Engineering from the University of Illinois at Urbana-Champaign.