| Quantiphi, Inc. | Marlborough | MA | Subcontractor |
| Quantum Management, LLC | Arlington | VA | Subcontractor |
| Quest Consulting Inc. | Clifton | VA | Subcontractor |
| Quiet Excellence LLC | Melbourne | FL | $0 |
| Rachel Tardiff PLLC | Washington | DC | Subcontractor |
| Radian Compliance, LLC | Des Plaines | IL | Subcontractor |
| Ramm Consulting Inc. | Cathedral City | CA | $0 |
| Randel Consulting Associates LLC | Kensington | MD | $0 |
| Rational, LLC | Hertford | NC | $0 |
| Razr Solutions, LLC | Flagler Beach | FL | Subcontractor |
| R Busseau LLC | Port Deposit | MD | $0 |
| RBW Strategy LLC | Olney | MD | Subcontractor |
| Rcadvising LLC | Tucker | GA | $0 |
| Rc Construction Services Inc. | Richland | WA | Subcontractor |
| Readiness Consulting Services, LLC | Stevensville | MD | Subcontractor |
| Readiness Resource Group Inc. | Las Vegas | NV | Subcontractor |
| Readyzonehq Inc. | Honolulu | HI | $0 |
| Real Centric Solutions, LLC | Richland | WA | Subcontractor |
| Re:build Manufacturing Solutions, LLC | Framingham | MA | Subcontractor |
| Recura Sh.a. | Pristina | | Subcontractor |
| Redevelopment Resources, Inc. | Asheville | NC | Subcontractor |
| Red Knight Consultants, LLC | Niceville | FL | Subcontractor |
| Redleg, LLC | Carlisle | PA | Subcontractor |
| Red Rock Government Services, LLC | Leesburg | VA | Subcontractor |
| Red Team Consulting LLC | Vienna | VA | Subcontractor |
| Reginald D Patrick | Houston | TX | $0 |
| Reimbursement Recovery Resources, LLC | Sanford | FL | Subcontractor |
| Renaye James Healthcare Advisors LLC | Columbia | MD | Subcontractor |
| Renvision Solutions LLC | Stafford | VA | Subcontractor |
| Resilient Solutions 21, Inc. | Albuquerque | NM | Subcontractor |
| Rev1 Ventures | Columbus | OH | $0 |
| Reveille Group LLC | Crystal River | FL | Subcontractor |
| Revere Federal Strategies LLC | Gambrills | MD | Subcontractor |
| Revu Healthcare LLC | North Brunswick | NJ | Subcontractor |
| Rexley LLC | Fairfax | VA | Subcontractor |
| Reynolds Valerie P | Hyattsville | MD | $0 |
| Rg International Technology Consulting LLC | Centreville | VA | $0 |
| Rhode Island Natural History Survey | Kingston | RI | $0 |
| RHR International LLP | Chicago | IL | $0 |
| Richard E Mallory | Orangevale | CA | $0 |
| Richard R. Mcnamara & Associates, LLC | Arlington | VA | Subcontractor |
| Richard Sanders LLC | Sacramento | CA | $0 |
| Richard Stem | Alder | MT | $0 |
| Ricky3sticks LLC | Silver Spring | MD | $0 |
| Rider Levett Bucknall Ltd.Phoenix, AZ · UEI DCJ4JV8DBNT8 | Phoenix | AZ | Subcontractor |
| Rider Levett Bucknall Ltd.Columbia, MD · UEI KBE8X67CSRL6 | Columbia | MD | Subcontractor |
| Rider Levett Bucknall Ltd.Tucson, AZ · UEI MTTDX65P5ZR9 | Tucson | AZ | Subcontractor |
| Rider Levett Bucknall Ltd.Honolulu, HI · UEI GBT1FEEX4XZ3 | Honolulu | HI | Subcontractor |
| Ridge Thomas Group, LLC | Upper Marlboro | MD | $0 |
| Rightsource Digital Services, Inc. | Signal Hill | CA | $0 |
| Right-trak Design, Inc. | Goffstown | NH | $0 |
| Right Wind Consulting, LLC | Huntsville | AL | Subcontractor |
| Riley Risk Inc. | St Augustine | FL | Subcontractor |
| Risk Prepared LLC | Denver | CO | Subcontractor |
| Risk Pro Solutions, LLC | Falls Church | VA | Subcontractor |
| Risks & Rewards Management Group, LLC | Saint Ignatius | MT | $0 |
| River Bend Consulting LLC | Bend | OR | Subcontractor |
| Robert K Hatley | Pelham | AL | $0 |
| Roberts Laura B | Cambridge | MA | $0 |
| Rockwell Automation, Inc. | Austin | TX | Subcontractor |
| Rogers Leadership Group LLC | North Augusta | SC | Subcontractor |
| Rohde Way, LLC | Saline | MI | Subcontractor |
| Rompt Consulting LLC | Orlando | FL | $0 |
| Romulus 1, LLC | Smithfield | VA | Subcontractor |
| Ronald S Marcus | Lawrenceville | NJ | $0 |
| Roncucci&partners S.R.L. | Bologna | | Subcontractor |
| Ronin Information Technology Services LLC | Herndon | VA | $0 |
| Ross Aero LLC | Torrance | CA | Subcontractor |
| Royal Consulting Firm, Inc. | Glenn Dale | MD | $0 |
| Royal Way, LLC | Arlington | VA | Subcontractor |
| Rp Opex LLC | Flower Mound | TX | Subcontractor |
| Rti Consulting, LLC | Marshall | VA | $0 |
| RTR Technologies, LLC | Aberdeen | MD | Subcontractor |
| Ruach Business Management Consulting LLC | Columbia | MD | Subcontractor |
| Rubin Mallows Worldwide | Chevy Chase | MD | Subcontractor |
| Rumley Solutions, Inc. | Atlanta | GA | Subcontractor |
| Rune, LLC | Fairfax | VA | Subcontractor |
| Rural Health Innovations, LLC | Duluth | MN | $0 |
| Rural Health Resource Center | Duluth | MN | $0 |
| Russell Management Group LLC | Owens Cross Roads | AL | $0 |
| Saa Solutions Inc. | West Chester | OH | Subcontractor |
| Safety Dynamics Group Inc. | Long Beach | CA | Subcontractor |
| Salvador Research & Controls LLC | Bothwell | WA | Subcontractor |
| Sansing Consulting, LLC | Ashburn | VA | Subcontractor |
| Saratoga Federal, LLC | Calistoga | CA | Subcontractor |
| Sauce Masters LLC | Highlands Ranch | CO | Subcontractor |
| Savi, LLC | Manhattan Beach | CA | Subcontractor |
| Savior Associates Limited Liability Company | Annville | PA | Subcontractor |
| Sces Consultants, LLC | Lawrenceville | GA | $0 |
| Schaffer Consulting LLC | New Haven | CT | Subcontractor |
| Schedule Management Solutions, Inc. | Severna Park | MD | Subcontractor |
| Schemtosh Consulting LLC | South Bend | IN | $0 |
| Scorpion Security Services LLC | New Braunfels | TX | Subcontractor |
| SDV Services, LLC | Tulsa | OK | Subcontractor |
| Se & C LLC | Richland | WA | Subcontractor |
| Sector C Solutions LLC | Newark | OH | $0 |
| Secure Technologies LLC | Indian Head | MD | Subcontractor |
| Security Affairs Network, LLC | Woodbridge | VA | Subcontractor |
| Sedona Technologies Government Services LLC | Moline | IL | Subcontractor |
| Seek Enterprises Inc. | Mineral | VA | $0 |
