| Summit Engineering & Design, Inc. | Columbia City | IN | Subcontractor |
| Sungate Design Group Pa | Raleigh | NC | $0 |
| Sunrise Engineering, LLC | Fillmore | UT | Subcontractor |
| Surany Research And Development LLC | Havre De Grace | MD | Subcontractor |
| Sustainability A To Z, LLC | Guilford | CT | $0 |
| Sustainable Engineering LLC | Las Cruces | NM | Subcontractor |
| Sustainable Engineering Solutions | Ramallah | | Subcontractor |
| Suttech Solutions LLC | Glenn Dale | MD | Subcontractor |
| Swaim Performance Solutions, LLC | Eva | AL | Subcontractor |
| Swanson Rink Inc. | Denver | CO | Subcontractor |
| Swca Environmental Consulting & Engineering, Inc. | Charlotte | NC | Subcontractor |
| Swigart Engineering | Poulsbo | WA | Subcontractor |
| Swiss Diesel Inc. | Sherrills Ford | NC | Subcontractor |
| Swmoz-svosve Limitada | Maputo | | $0 |
| Sword Engineering LLC | Albuquerque | NM | Subcontractor |
| Synergetic Industries LLC | Morton | IL | Subcontractor |
| Synergy Aerospace, Inc. | Lexington Park | MD | Subcontractor |
| Synesis Partners LLC | Overland Park | KS | Subcontractor |
| Synexxus Inc. | Annapolis | MD | Subcontractor |
| Synterra Corporation | Greenville | SC | Subcontractor |
| Syska Hennessy Group Inc.San Diego, CA · UEI FM78ZWH1S6H3 | San Diego | CA | $0 |
| Syska Hennessy Group Inc.Washington, DC · UEI KURNEKMY2WY9 | Washington | DC | $0 |
| Syska Hennessy Group Inc.San Francisco, CA · UEI N84AKGDFKK85 | San Francisco | CA | $0 |
| Syska Hennessy Group Inc.New York, NY · UEI Q2KKJUXJCX52 | New York | NY | Subcontractor |
| Systech Fire Protection LLC | Palos Park | IL | $0 |
| Systematicx Inc. | Ogden | UT | Subcontractor |
| System Fundamentals, Incorporated | Great Falls | VA | Subcontractor |
| Systems Analysis Inc. | Birmingham | AL | Subcontractor |
| Systems Design And Analysis Inc. | Zionsville | IN | $0 |
| Systems Energy Audit Co. Inc. | Temecula | CA | Subcontractor |
| System Services Corporation | San Jose | CA | Subcontractor |
| Systems Management Acquisition Research & Technology LLC | Havre De Grace | MD | Subcontractor |
| Systems Management Technology, Incorporated | Falls Church | VA | Subcontractor |
| Systems Marketing U.S.A L.L.C | Aurora | IL | Subcontractor |
| System & Software Designers Inc. | Columbia | MD | Subcontractor |
| Systems Planning And Analysis, Inc. | Perry | UT | Subcontractor |
| Systems Service Enterprises, Inc. | Saint Louis | MO | Subcontractor |
| Systems Strategies & Analysis, Inc. | Laurel | MD | Subcontractor |
| Systems West Engineers Inc. | Springfield | OR | $0 |
| Systra Consulting, Inc. | Bloomfield | NJ | Subcontractor |
| T2 Ues, Inc. | Indianapolis | IN | Subcontractor |
| T3 Alaska, LLC | Anchorage | AK | Subcontractor |
| T4 Consultants LLC | Albuquerque | NM | Subcontractor |
| T4 Engineering Solutions LLC | Highlands Ranch | CO | Subcontractor |
| T5 Solutions LLC | Gurley | AL | Subcontractor |
| Tab Engineers LLC | Kaneohe | HI | Subcontractor |
| Tactical Communications, LLC | Morganton | GA | $0 |
| Tactical-consulting LLC | Dexter | NY | Subcontractor |
| Tactical Outfitters LLC | North Charleston | SC | $0 |
| Tait & Associates, Inc. | Santa Ana | CA | $0 |
| Taitem Engineering DPC | Ithaca | NY | Subcontractor |
| Taliaferro & Browne Inc. | Kansas City | MO | Subcontractor |
| Taliaferro&browne-kabbes Engineering A Joint Venture | Kansas City | MO | $0 |
| Talos Mission Solutions Inc. | Annapolis Junction | MD | Subcontractor |
| Tami Lynn Holley, Pe, LLC | Littleton | CO | $0 |
| Tap Engineering LLC | Columbia | MD | Subcontractor |
| Tarhun 3D LLC | Topeka | KS | Subcontractor |
| Tarricone Rossi & Holmes Technologies, Inc. | Narragansett | RI | Subcontractor |
| Tasc Technical Services, L.L.C. | Plaistow | NH | Subcontractor |
| Tatro Hinds Advanced Concrete Engineering, Inc. | Walla Walla | WA | Subcontractor |
| Taylor Engineering, LLP | Alameda | CA | Subcontractor |
| Taylor, Wiseman & Taylor | Mount Laurel | NJ | $0 |
| Tcm-kira Integrated Services, LLC | Alexandria | VA | Subcontractor |
| Team Up Staffing LLC | Austin | TX | Subcontractor |
| Techdev Consulting Inc. | Springfield | VA | Subcontractor |
| Technical Adventures LLC | Merritt Island | FL | Subcontractor |
| Technical Assurance, Inc. | Willoughby | OH | Subcontractor |
| Technical Documentation Consultants Of Arizona, Inc. | Tucson | AZ | $0 |
| Technical Management Inc. | San Diego | CA | Subcontractor |
| Technical Recruiting Solutions, Inc. | Tallahassee | FL | Subcontractor |
| Techni-core Engineering, Inc. | Huntsville | AL | Subcontractor |
| Techno Consult International PVT Ltd. | Karachi | | $0 |
| Techno Dimensions Inc. | Irvine | CA | Subcontractor |
| Technology Advancements, Inc. | Playa Del Rey | CA | Subcontractor |
| Technology In Practice LLC | Phelan | CA | $0 |
| Technology Management Associates Inc. | Chantilly | VA | Subcontractor |
| Technology Site Planners, Inc. | Plain City | OH | $0 |
| Technovare Systems, Inc. | Santa Ana | CA | Subcontractor |
| Tech. Services To Go, Inc. | Saint Louis | MO | $0 |
| Techsolve, Inc. | Blue Ash | OH | Subcontractor |
| Tech USA Government Solutions LLC | Millersville | MD | Subcontractor |
| Techven Systems LLC | Stillwater | OK | $0 |
| Teecom | Bradenton | FL | Subcontractor |
| Teknicare Inc. | Albuquerque | NM | Subcontractor |
| Teknologic Engineering Services, Inc. | Edmonds | WA | $0 |
| Telamon Engineering Consultants Inc. | San Francisco | CA | Subcontractor |
| Telecommunication Systems Inc. | Cypress | CA | Subcontractor |
| Telegrid Technologies Inc. | Livingston | NJ | Subcontractor |
| Teleios Defense Solutions LLC | Huntsville | AL | Subcontractor |
| Televate, LLC | Henrico | VA | $0 |
| Telgian Engineering & Consulting LLC | Phoenix | AZ | Subcontractor |
| Telnet Inc. | Rockville | MD | $0 |
| Temptech Engineering Corp. | Charlestown | MA | Subcontractor |
| Ten Point Technologies, LLC | Palm Springs | CA | Subcontractor |
| Tensor Innovation Partners, LLC | Longwood | FL | $0 |
| Terraconcepts, LLC | Sterling | VA | $0 |
| Terracon Consultants Inc.Charlotte, NC · UEI E2MFMMCYDTG5 | Charlotte | NC | Subcontractor |
| Terracon Consultants Inc.Fort Collins, CO · UEI E8HGKJA8KCG5 | Fort Collins | CO | Subcontractor |
| Terracon Consultants Inc.Port Saint Lucie, FL · UEI F87LER8E5RJ9 | Port Saint Lucie | FL | Subcontractor |
| Terracon Consultants Inc.Tucson, AZ · UEI FF4LBBJKAYK3 | Tucson | AZ | Subcontractor |
