Rajeev Thakur is a Computer Scientist in the Mathematics and Computer Science Division at Argonne National Laboratory. He received a Ph.D. in Computer Engineering from Syracuse University in 1995. His research interests are in the area of high-performance computing in general and high-performance communication and I/O in particular. He was a member of the MPI Forum and participated actively in the definition of the I/O part of the MPI-2 standard. He is also the author of a widely used, portable implementation of MPI-IO, called ROMIO. He is currently involved in the development of the MPICH2 Implementation of MPI, which won a 2005 R&D 100 Award. Rajeev is a co-author of the book "Using MPI-2: Advanced Features of the Message Passing Interface" published by MIT Press. He is an associate editor of IEEE Transactions on Parallel and Distributed Systems.