The Advanced Composition Explorer (ACE) is a National Aeronautics and Space Administration (NASA) Explorer mission. Before launch, ACE was managed by the Office of Space Science Mission and Payload Development Division of NASA.

• NASA Headquarters
  NASA Science Mission Directorate (SMD)
  • Jeff Hayes -- ACE Program Executive
• NASA Goddard Space Flight Center (NASA/GSFC)
  Heliophysics Science Division
  • Overall project management
    • Nicholas G. Chrissotimos -- Associate Director of Flight Projects, Explorers Program
  • Science Management
    • Dr. Eric Christian -- ACE Project Scientist
  • Flight Operations
    • Beth Pumphrey -- Mission Director
• California Institute of Technology (Caltech)
  Space Radiation Laboratory
  • Science Management
    • Dr. Edward C. Stone -- ACE Principal Investigator
    • Dr. Richard A. Mewaldt -- ACE Mission Scientist
  • ACE Science Center
    • Dr. Andrew J. Davis -- ACE Science Center Manager
• Johns Hopkins University
  Applied Physics Laboratory (JHU/APL)
  • Spacecraft development
  • Observatory integration and test

• Principal Investigator:
  • E.C. Stone -- Caltech/JPL
• Project Scientist:
  • E.R. Christian -- NASA/GSFC
• Co-Investigators:
  • W.R. Binns -- Washington University, St. Louis
  • P. Bochsler -- University of Bern, Switzerland
  • L.F. Burlaga -- NASA/GSFC
  • A.C. Cummings -- Caltech
  • R.M. Skoug -- Los Alamos National Laboratory
  • G. Gloeckler -- University of Maryland
  • R.E. Gold -- Johns Hopkins University / APL
  • D. Hovestadt -- Max Planck Institute for extraterrestrial Physics, Germany
  • M.H. Israel -- Washington University, St. Louis
  • B. Klecker -- Max Planck Institute for extraterrestrial Physics, Germany
  • S.M. Krimigis -- Johns Hopkins University / APL
  • G.M. Mason -- University of Maryland
  • D. McComas -- Los Alamos National Laboratory
  • R.A. Mewaldt -- Caltech
  • E. Moebius -- University of New Hampshire
  • N.F. Ness -- University of Delaware
  • J.A. Simpson -- University of Chicago (deceased)
  • C.W. Smith -- University of New Hampshire
  • M.E. Wiedenbeck -- JPL
  • R.F. Wimmer-Schweingruber -- University of Bern, Switzerland
  • T.H. Zurbuchen -- University of Michigan