Dr. Jose G. Castanos obtained his undergraduate degree in Operations Research at the Universidad Catolica Argentina, and his Sc.M. and Ph.D in Computer Science at Brown University. In 2000 he joined the Blue Gene team at the IBM T. J. Watson Research Center to develop and analyze the initial molecular dynamics codes for this architecture. He has worked on a wide variety of systems software and performance analysis projects related to Blue Gene. He developed the multiprocessor simulation infrastructure, collaborated on compilers, kernels and libraries, provided a software development environment for Blue Gene, designed its control system, and studied applications and benchmarks on this architecture.