Professional Service:

• 1999: Scientific Organizing Committee for LANL Workshop Small Missions for Energetic Astrophysics: Ultraviolet through Gamma-Ray
• 1998-1999: Graduate Program Committee, PSU Dept. of Astron. & Astrophys.
• 1998: member of NASA Grants Management Process Review Panel, advising NASA on a complete overhaul of the process by which NASA awards and manages grants.
• 1997-1999: member of the Sounding Rocket Working Group, which advises NASA/Wallops Flight Facility on the sounding rocket program operations.
• 1997-present: member of the Astrophysics Working Group, which advises NASA's Office of Space Science on matters related to astrophysics.
• 1997: Scientific Organizing Committees for the ASCA Cherry Blossom Workshop and the 1997 HEAD meeting.
• 1996-1997: member of the Executive Council of the High Energy Astrophysics Division of the American Astronomical Society.
• 1995-1998: member of the ASCA User's Group, which advises NASA on issues relevant to the users of the ASCA satellite.
• 1993-2000: department advisor for the Eberly College of Science Cooperative Education Program.
• 1992-present: chair, departmental Shop Committee
• 1990-1993: chair, departmental Social Committee
• 1988-present: member of various peer review panels for the National Radio Astronomy Observatory, Smithsonian Institution, University of California/California Space Institute, and NASA (including UV/Visible Sounding Rocket program, Theoretical Astrophysics program, Small Explorer program, ROSAT Guest Observer program, and ASCA Guest Observer program).
• 1985-present: referee for the Astrophysical Journal, Astrophysical Journal (Letters), Experimental Astronomy, and Nature.