| Onsiteitadvisors LLC | Cumming | GA | Subcontractor |
| On The Job Consulting, Inc. | Champaign | IL | $0 |
| Open Automation Software, Inc. | Spokane | WA | $0 |
| Open Grid Computing, Inc. | Austin | TX | Subcontractor |
| Openiam LLC | Cortlandt Manor | NY | Subcontractor |
| Opensource Connections, LLC | Charlottesville | VA | Subcontractor |
| Open Technology Group Inc. | Apex | NC | $0 |
| Optima Global Solutions Inc. | Hamilton | NJ | Subcontractor |
| Optimal Idm, LLC | Saint Petersburg | FL | Subcontractor |
| Optimos, LLC | Mclean | VA | Subcontractor |
| Option Technologies International LLC | Orlando | FL | $0 |
| Optisched LLC | Colorado Springs | CO | $0 |
| Optum Government Solutions, Inc. | Eden Prairie | MN | Subcontractor |
| Optuminsight, Inc. | Eden Prairie | MN | Subcontractor |
| Opus Logica Inc. | Santa Barbara | CA | Subcontractor |
| Orca Database Systems Inc. | Leesburg | VA | Subcontractor |
| Orchid Technologies, Inc. | Largo | FL | Subcontractor |
| Ordusion Technologies, Inc. | Duluth | GA | Subcontractor |
| Orion Network Solutions Inc. | Hayden | ID | $0 |
| Orion Systems Integrators, LLC | Edison | NJ | Subcontractor |
| Ortus Solutions Corp. | Augusta | GA | Subcontractor |
| Osi, LLC | Fulton | MD | Subcontractor |
| Osr Open Systems Resources Inc. | Manchester | NH | $0 |
| Oss Inc. | Gaithersburg | MD | $0 |
| Oss Nokalva Inc. | Somerset | NJ | Subcontractor |
| Osum Solutions Inc. | Centreville | VA | Subcontractor |
| Otn Consulting LLC | Suwanee | GA | Subcontractor |
| Ourea Solutions LLC | Gladstone | MO | Subcontractor |
| Overseas Services, LLC | Ashburn | VA | Subcontractor |
| Pacgenesis Inc. | Austin | TX | Subcontractor |
| Paladin Consulting, Inc. | Dallas | TX | Subcontractor |
| Palladium Consulting Inc. | Rollingwood | TX | Subcontractor |
| Pangaea Information Technologies Ltd. | Evanston | IL | Subcontractor |
| Paperless Knowledge, Inc. | Fort Bragg | CA | $0 |
| Parabon Computation, Inc. | Reston | VA | $0 |
| Paradigm Software, L.L.C. | Hunt Valley | MD | $0 |
| Parasim, Inc. | Los Angeles | CA | $0 |
| Parsage Inc. | Chevy Chase | MD | Subcontractor |
| Particle Analytics LLC | Brick | NJ | $0 |
| Partners In Control, Inc. | Irvine | CA | $0 |
| Paruka LLC | Fairfax | VA | Subcontractor |
| Parvus Captus LLC | Tucson | AZ | Subcontractor |
| Pathway Technologies & Services PVT. Ltd. | Kathmandu | | Subcontractor |
| Pavati Solutions LLC | Monte Sereno | CA | Subcontractor |
| PC Weather Products, Inc. | Marietta | GA | $0 |
| Peak Mountain Technology Solutions LLC | Harahan | LA | $0 |
| Peek Vision Ltd. | London | | Subcontractor |
| Pembco Solutions Inc. | Horace | ND | Subcontractor |
| Pepperdash Technology Corporation | Salem | MA | Subcontractor |
| Peraton Labs Inc. | Bedford | NH | Subcontractor |
| Percipient.ai Inc. | Santa Clara | CA | Subcontractor |
| Performant Software Solutions, LLC | Charlottesville | VA | $0 |
| Perigee Systems LLC | Madison | AL | Subcontractor |
| Perius, Inc. | Moneta | VA | Subcontractor |
| Persistent Systems Inc. | Santa Clara | CA | Subcontractor |
| Persistent Systems Ltd. | Pune | MAHARASHTRA | Subcontractor |
| Perspecta LLC | Langhorne | PA | Subcontractor |
| Phantom Design | Santa Ana | CA | Subcontractor |
| Phoenix Business Inc. | Sarasota | FL | $0 |
| Phorfront, LLC | Arlington | VA | Subcontractor |
| Pico Systems Inc. | Blacksburg | VA | $0 |
| Pinnacle Global Services LLC | Wilmington | MA | $0 |
| Pinnacle Systems Inc. | Gainesville | VA | Subcontractor |
| Pinnacle Technical Resources Inc. | Dallas | TX | Subcontractor |
| Pipkins, Inc. | O Fallon | MO | $0 |
| Pivotal I4dm JV LLC | Raleigh | NC | Subcontractor |
| Planet Works, Inc. | Pasadena | MD | Subcontractor |
| Platinum Networks LLC | Oceanport | NJ | $0 |
| Ploto Inc. | Round Rock | TX | $0 |
| Pojo Software Incorporated | Falls Church | VA | Subcontractor |
| Poket Inc. | Toronto | ON | Subcontractor |
| Policyedge Ai LLC | Gambrills | MD | Subcontractor |
| Polygon Partners LLC | Staten Island | NY | Subcontractor |
| Ponder Pro Serve, Inc. | Griffin | GA | Subcontractor |
| Positioning Systems Research | La Jolla | CA | Subcontractor |
| Positive Edge Strategies, Inc. | Centreville | VA | $0 |
| Positive Group LLC | Alpharetta | GA | Subcontractor |
| Powercon Engineering, Inc. | Tustin | CA | Subcontractor |
| Poweredbylogic Inc. | Manassas | VA | Subcontractor |
| Powerpivotpro LLC | Seattle | WA | $0 |
| Power Resources International Inc. | West Babylon | NY | $0 |
| Powersoft Systems Inc. | Leawood | KS | Subcontractor |
| Powersolv, Inc. | Reston | VA | $0 |
| Practicevantage Consulting Group, LLC | Chandler | AZ | Subcontractor |
| Precision Focus Training And Consulting, LLC | Aldie | VA | Subcontractor |
| Precision Systems Inc. | Horsham | PA | $0 |
| Pretek-citizant JV, LLC | Leesburg | VA | $0 |
| Pretek Corporation | Leesburg | VA | Subcontractor |
| Pricesenz LLC | Irving | TX | Subcontractor |
| Primatest Inc. | San Ramon | CA | Subcontractor |
| Primus Visual Technology Corp. | Bowie | MD | Subcontractor |
| Princeton Consultants, Inc. | Princeton | NJ | Subcontractor |
| Priomatics Inc. | Covington | OH | $0 |
| Processuspragma Inc. | Saint-hubert | QC | Subcontractor |
| Professional Resources In Information Systems Management, Inc. | Reston | VA | Subcontractor |
| Proficient Information Technologies Inc. | Dayton | OH | $0 |
| Progeny Genetics LLC | Aliso Viejo | CA | $0 |
| Progressive Microtechnology, Inc. | Saint Augustine | FL | $0 |
| Prologic, Inc. | Austin | TX | Subcontractor |
| Proobject, Inc. | Hanover | MD | $0 |
