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- DDL OMNI Engineering
- AEPCO
- Alion Science and Technology
- Amoorer
- Anteon Corporation
- ASC
- BAE Systems
- BearingPoint
- Capstone Corporation
- CDI Government Services
- Chugach Systems Integration
- Dynamics Research Corporation (DRC)
- EG&G Technical Services
- Engenium Technologies Corporation
- Epsilon Systems Solutions
- ETI Professionals
- George G. Sharp, Inc.
- Gryphon Technologies
- IBM
- ICI
- INDUS Technology
- InfraTech.us
- JACER
- John J. McMullen Associates (JJMA)
- Kok & Associates Inc.
- ManTech Systems Engineering Corporation
- Northrop Grumman
- NTI Corporation
- Purvis Systems
- Quadelta
- RAE
- Sonalysts
- Thomas Associates
- Technology Management Group (TMG)
- Titan
- Wyle
Laboratories
