Parsons Corporation  (19) VectorCSP  (19) Sigma Defense  (16) SAIC  (14) ManTech International  (11) Huntington Ingalls Industries  (11) Amentum  (10) Life Cycle Engineering  (10) LB&B  (9) Leidos Holding  (9) Yorktown Systems Group, Inc.  (8) ECS  (8) Systems Application & Technologies, Inc.  (8) Synectic Solutions Inc  (8) Serco North America  (7) Apex Systems  (6) Epsilon Systems  (5) Ironclad Defense Works  (5) Ghostrock LLC  (5) Solvere Technical Group LLC  (5) Three Saints Bay, LLC  (4) GCyber  (4) DEFTEC Corporation  (4) Naval Systems Inc  (4) UIC Alaska  (3) GTangible Corporation  (2) Valkyrie Enterprises  (2) Cydecor, Inc.  (2) LMR Technical Group  (2) DLH  (2) Peraton  (2) Gateway Ventures, Inc.  (1) SEACORP  (1) Northrop Grumman  (1) Goodwill of Central & Coastal Virginia  (1) The Moore Group  (1) Sparibis  (1) ASRC Federal Holding Company  (1) Paragon  (1) Delphinus Engineering  (1) Sayres & Associates  (1) Logistics Management Institute  (1) The Tatitlek Corporation  (1) IBR (Imagine Believe Realize)  (1) DSA, Inc.  (1) Innovatus Technology Consulting  (1) Centuria  (1) Noblis  (1) Azimuth Corporation  (1) T-Solutions, Inc.  (1) System Studies & Simulation  (1) C2 Technologies  (1) USMMI  (1) Strategic Data Systems  (1) SMX  (1) SimIS Inc.  (1) Bowhead  (1) Navy Exchange Service Command  (1)