| Chesapeake Network Installations, Inc. | Pasadena | MD | Subcontractor |
| Clark Computer Services, Inc. | Frederick | MD | $0 |
| Clearshark Services, Inc. | Hanover | MD | Subcontractor |
| Clifyx Inc. | South Plainfield | NJ | Subcontractor |
| Cloud Catalogs LLC | Basking Ridge | NJ | Subcontractor |
| Cloudgov Technologies LLC | Rockville | MD | Subcontractor |
| Cloudqnect LLC | Glen Allen | VA | Subcontractor |
| CLR Technology Services, LLC | Shenandoah | VA | Subcontractor |
| Cm Consulting, Inc. | Franklin | VA | Subcontractor |
| Columbia Technology Partners, Inc. | Columbia | MD | Subcontractor |
| Competitive Telephone Systems, Inc. | Bloomfield Hills | MI | $0 |
| Computacenter United States Inc. | Westwood | MA | Subcontractor |
| Computer Condiments, Inc. | Panorama City | CA | $0 |
| Conceal, Inc. | Augusta | GA | $0 |
| Concordian Corporation | Sterling | VA | Subcontractor |
| Consultants In Data Processing, Inc. | Charlotte | NC | Subcontractor |
| Cooper Notification, Inc. | Sarasota | FL | Subcontractor |
| Copper River Information Technology, LLC | Chantilly | VA | Subcontractor |
| Cordoba Corp. | Los Angeles | CA | $0 |
| Cornsilk Company | Collinsville | OK | $0 |
| Corporate Technologies Inc. | Burlington | MA | $0 |
| Corste Consulting, LLC | Bethesda | MD | Subcontractor |
| Corvus Integration Inc. | Vienna | VA | $0 |
| C-pak Corporation | Lagrange | GA | $0 |
| C P R Tools, Inc. | Fort Myers | FL | $0 |
| Crayon Software Experts LLC | Dallas | TX | Subcontractor |
| Creek Pointe Computers, Inc. | Greenville | SC | $0 |
| Critical Link LLC | Syracuse | NY | Subcontractor |
| Critical Role LLC | Fort Payne | AL | Subcontractor |
| Critical Solutions LLC | Pasadena | MD | Subcontractor |
| Critical Start, Inc. | Plano | TX | Subcontractor |
| Criticaltilt, Inc. | Henderson | NV | Subcontractor |
| Cross Solutions LLC | Glen Arm | MD | Subcontractor |
| Crucible Criminal Justice Programs, LLC | Gaithersburg | MD | Subcontractor |
| CS9 Technologies, LLC | Triangle | VA | Subcontractor |
| CST2000, LLC | Southfield | MI | $0 |
| Ctri, LLC | Great Falls | VA | $0 |
| Cumberland Group, LLC | Atlanta | GA | Subcontractor |
| Curo International LLC | Anchorage | AK | Subcontractor |
| Custominsight, LLC | Carson City | NV | $0 |
| Cyber25, LLC | Albuquerque | NM | Subcontractor |
| Cyber Clarity Inc. | Haymarket | VA | Subcontractor |
| Cybercore Technologies LLC | Elkridge | MD | Subcontractor |
| Cyber Defense Solutions LLC | Woodbridge | VA | Subcontractor |
| Cyber Diligence, Inc. | Syosset | NY | $0 |
| Cyber Domain LLC | Great Falls | VA | $0 |
| Cyber Engineering Services, Inc. | Clarksville | MD | Subcontractor |
| Cybereye Consulting LLC | Doral | FL | Subcontractor |
| Cyber Lab, LLC | Dededo | GU | Subcontractor |
| Cyber Management International Corporation | Ashburn | VA | Subcontractor |
| Cyberpursuit LLC | West Palm Beach | FL | Subcontractor |
| Cyber Tactics LLC | Mc Lean | VA | $0 |
| D2 Consulting, LLC | Arlington | VA | Subcontractor |
| Daj Consulting LLC | Laurel | MD | $0 |
| Dallas Digital Services, L.L.C. | Southlake | TX | $0 |
| Dallas/fort Worth Technology, Inc. | Richardson | TX | $0 |
| Darkowl, LLC | Denver | CO | Subcontractor |
| Dasa Technical Services LLC | Davie | FL | Subcontractor |
| Dasher Technologies, LLC | San Jose | CA | Subcontractor |
| Datadog, Inc. | New York | NY | Subcontractor |
| Data Frog LLC | Vienna | VA | Subcontractor |
| Data Management Services Inc. | Frederick | MD | $0 |
| Data Networks Of America, Inc. | Hunt Valley | MD | Subcontractor |
| Datapivot Technologies Inc. | North Andover | MA | Subcontractor |
| Data Processing Solutions, Inc. | Columbia | MD | $0 |
| Dataray Solutions, LLC | Baltimore | MD | Subcontractor |
| Datavant, LLC | Phoenix | AZ | $0 |
| Datel Systems Incorporated | San Diego | CA | $0 |
| Dates Inc. | Olney | MD | $0 |
| Davenport Group, Inc. | Lewisburg | TN | Subcontractor |
| Decision Point Security Inc. | Defuniak Springs | FL | Subcontractor |
| Deg Technologies LLC | Fleming Island | FL | $0 |
| Denia Cristina Ordonez Lopez | Tegucigalpa | FRANCISCO MORAZAN | $0 |
| Derwood Technology Inc. | Derwood | MD | Subcontractor |
| Destiny Corp. | Henderson | NV | $0 |
| Dhe Computer Systems LLC | Centennial | CO | $0 |
| Digilent Consulting, LLC | Vienna | VA | $0 |
| Digital Clouds For Computer Services And Consulting Co. | Amman | | Subcontractor |
| Digital Preservation, LLC | Wildwood | MO | $0 |
| Digital Securus LLC | Wasilla | AK | $0 |
| DNC Corp. | Alexandria | VA | $0 |
| Docebo Na, Inc. | Athens | GA | Subcontractor |
| Dragonfli Group, LLC | Williamsburg | VA | Subcontractor |
| Drayton Drayton & Lamar Inc. | Evans | GA | $0 |
| Drayton, Drayton & Lamar, Inc. | Evans | GA | $0 |
| Dropbox Inc. | San Francisco | CA | $0 |
| Dunbar Consulting, Inc. | Gainesville | VA | Subcontractor |
| Duncan Distribution Co. LLC | Simi Valley | CA | $0 |
| Dynamics Edge | Sacramento | CA | $0 |
| Dynavet Solutions LLC | Pembroke Pines | FL | Subcontractor |
| Dynecon, LLC | Springfield | VA | Subcontractor |
| Dyntek, Inc. | Irvine | CA | $0 |
| Eastern Sky Solutions, LLC | Scottsdale | AZ | $0 |
| Easyrok LLC | Las Vegas | NV | Subcontractor |
| E Crane Computing Inc. | Concord | NH | $0 |
| Edgate Correlation Services, LLC | Gig Harbor | WA | $0 |
| Edge 360 LLC | Ashburn | VA | Subcontractor |
| Edge Solutions LLC | Alpharetta | GA | Subcontractor |
| Edts LLC | Augusta | GA | $0 |
| Education Technologies, Inc. | Albuquerque | NM | $0 |
