Deputy CIO for Cyberinfrastructure and Research IT, Division of Information Technology, University of Maryland
Senior Director of Research, NVIDIA
Director, University of Maryland Institute for Advanced Computer Studies (UMIACS)
Office of High Performance Computing and Communications, National Library of Medicine, National Institutes of Health
Information Technology Laboratory, NIST
Founder, IGI Technologies
Alumni Centennial Professor, Department of Physics and Astronomy, Johns Hopkins University.
Associate Professor, Department of Biology and UMIACS, University of Maryland
Professor, Department of Computer Science and UMIACS, University of Maryland
Professor, Department of Mechanical Engineering and Institute for Systems Research, University of Maryland
Professor, Department of Electrical and Computer Engineering and UMIACS, University of Maryland
Department Chair, Minta Martin Professor of Aerospace Engineering, University of Maryland
Associate Professor, Department of Chemical and Biomolecular Engineering, A. James Clark School of Engineering, University of Maryland
Associate Professor, School of Engineering and Applied Science, George Washington University
Professor, Computer Science and UMIACS, University of Maryland
Project Leader, ASC Production Visualization Project, Los Alamos National Laboratory
Associate Professor, College of Information Studies and UMIACS, University of Maryland
Computational Sciences Division, Army Research Laboratory
Naval Research Laboratory
ODNI/IARPA