- The U.S. Department of Energy (NE, NNSA)
- The U.S. Department of Homeland Security (DNDO)
- The U.S. Department of State (PNS)
- The U.S. Department of Education
- The U.S. Department of Defense (DTRA, AFTAC)
- The U.S. Department of Agriculture
- The U.S. Nuclear Regulatory Commission
- The U.S. National Science Foundation
- U.S. National Laboratories
- Non-Governmental Organizations: IAEA, Carnegie Endowment for International Peace, Carnegie Corp. of New York, CRDF Global
- Industry: Zel Technologies, Science Applications International Corporation (SAIC), and Luminant, Inc.