Lockheed Martin  (238) Serco  (28) Cole Engineering Services, Inc  (11) Leidos  (9) General Dynamics Mission Systems  (7) Scientific Research Corporation  (5) AMERICAN SYSTEMS  (5) Northrop Grumman  (4) Booz Allen Hamilton  (4) L3Harris Technologies  (4) Oracle  (2) MITRE Corporation  (2) Ascension Federal Services Inc  (2) Command Post Technologies, Inc.  (1) MILVETS Systems Technology, Inc.  (1) ASEC  (1) Seneca Holdings  (1) V2X  (1) RTX  (1) Boeing Defense Systems  (1) VTG Defense  (1) KBR  (1) Prism Inc  (1) Everforth ECS  (1) CACI  (1) CICONIX  (1) Mission Critical Solutions  (1) Kaimetrix  (1)