Omar Ghattas is the John A. and Katherine G. Jackson Chair in Computational Geosciences and Professor of Geological Sciences and Mechanical Engineering at the University of Texas at Austin; Research Professor in the Institute for Geophysics; Director of the Center for Computational Geosciences in the Institute for Computational Engineering and Sciences; Professor of Biomedical Engineering and Computer Sciences (by courtesy); and Chief Applications Scientist for Ranger, the NSF Track 2 supercomputer at the Texas Advanced Computing Center. Prior to September 2005, he was a professor at Carnegie Mellon University. He received his BS, MS, and PhD from Duke University in 1984, 1986, and 1988, respectively. He has been a visiting professor at the Institute for Computer Applications in Science and Engineering (ICASE) at NASA-Langley Research Center, the Center for Applied Scientific Computing (CASC) at Lawrence Livermore National Laboratory, and the Computer Science Research Institute (CSRI) at Sandia National Laboratories. Dr. Ghattas has general research interests in large-scale forward and inverse modeling and simulation on parallel supercomputers. His specific research focuses on optimization, parameter estimation, and uncertainty quantification for problems in the geological, mechanical, and biomedical engineering sciences. He received the 1998 Allen Newell Medal for Research Excellence, the 2003 Gordon Bell Prize for Special Accomplishment in Supercomputing, the 2004/2005 CMU College of Engineering Outstanding Research Prize, and the SC2006 HPC Analytics Challenge Award, with members of the Quake research project at CMU. His paper on inverse wave propagation with former students V. Akcelik and G. Biros received the SC2002 Best Technical Paper award.