• [2010 - present] Director, LSU Center for Computation & Technology
• [2010 - present] Floating Point Systems Chaired Professor of Computational Methods
• [2002 - present] Alumni Professor, Department of Physics and Astronomy, LSU
• [2009 (Mar - Dec)] Interim Executive Director, LONI (Louisiana Optical Network Initiative)
• [2001 - 2003] Interim Director, LSU CAPITAL (Center for Applied Information Technology and Learning)
• [1990 - 2002] Professor, Department of Physics and Astronomy, LSU
• [January - May, 2000] Visiting Associate in Astronomy,
  Division of Physics, Mathematics and Astronomy, California Institute of Technology
• [1994 - 1997] Professor and Chairman, Department of Physics & Astronomy, LSU
• [1986 - 1990] Associate Professor, Department of Physics and Astronomy, LSU
• [1982 - 1986] Assistant Professor, Department of Physics and Astronomy, LSU
• [1980 - 1982] Postdoctoral Fellow, Group T-6, Los Alamos National Laboratory
• [1978 - 1980] J. Willard Gibbs Instructor, Astronomy Department, Yale University

Awards:

• [2010] Floating Point Systems Chaired Professor of Computational Methods
• [2008] Fellow of AAAS (American Association for the Advancement of Science)
• [2002] San Diego LSU Alumni Association Chapter Alumni Professorship, Louisiana State University
• [2001] Distinguished Research Master, Louisiana State University
• [2001] Excellence in Graduate Instruction, College of Basics Sciences, LSU

• National Science Foundation, Directorate of Mathematical & Physical Sciences
  • [2007 - 2010] Member, Advisory Committee (MPSAC)
• National Science Foundation, Office of the Director
  • [2008 - 2009] Member, Advisory Committee for GPRA Performance Assessment (AC/GPA)
• National Science Foundation, Division of Astronomical Sciences
  • [2011] Chair, Committee of Visitors
  • [2008] Member, Committee of Visitors (COV Reports)
• Internet2
  • [1998 - 2002] Member, Applications Strategy Council
• American Astronomical Society
  • [1999 - 2001] Member, Publications Board
• American Institute of Physics
  • [2006 - 2010] Co-Editor, Visualization Corner for Computing in Science & Engineering
  • [1996 - 1999] Member, Advisory Board to Computers in Physics and Computing in Science & Engineering Magazines
• Division on Dynamical Astronomy of the American Astronomical Society
  • [1993 - 1995] Member, Division Committee
  • [1990 - 1991] Chair, Brouwer Award Selection Committee
  • [1988 - 1990] Member, Brouwer Award Selection Committee

Citizenship:    U.S.A.