| Rt Solutions Corporation | Dunn Loring | VA | Subcontractor |
| Rural Support Programmes Network | Islamabad Gpo | | $0 |
| Sabine Surveyors Ltd. | Port Arthur | TX | $0 |
| Sagefox Consulting Group LLC | Amherst | MA | Subcontractor |
| Samuel Spencer Stone | Morgantown | WV | $0 |
| San Diego Air And Space Technology Center, Inc. | San Diego | CA | Subcontractor |
| Sara Adler | Los Angeles | CA | $0 |
| Sarah Erskine | Eugene | OR | $0 |
| Sarah Thompson Mcqueen | Monroe | LA | $0 |
| Sarah Van De Pol | Arlington | VA | $0 |
| Saudi Logistics And Technical Support | Riyadh | | $0 |
| Scanning Solutions, LLC | Redmond | WA | $0 |
| Scansite, Inc. | Novato | CA | $0 |
| Scisco Genetics, Inc. | Seattle | WA | $0 |
| Seaside Innovations, LLC | Tampa | FL | Subcontractor |
| Sea Trials Command Organization LLC | Camas | WA | Subcontractor |
| Secdev Group Corp. | Ottawa | ON | Subcontractor |
| Securebine Solutions LLC | Newark | DE | Subcontractor |
| Secure Health Plans Of Georgia, LLC | Macon | GA | $0 |
| Securetech 360, LLC | Arlington | VA | Subcontractor |
| Select P.o.s. & Peripherals, LLC | Edina | MN | $0 |
| Seltzer Rena | Ann Arbor | MI | $0 |
| SFTBD, Inc. | Los Altos | CA | Subcontractor |
| Shadowbox Design Management, Inc. | Bethpage | NY | $0 |
| Shah Pinakin | Spring | TX | Subcontractor |
| Shauna S Roberts PH.D | Weaverville | NC | $0 |
| Sierra Nevada Company, LLC | Zimmerman | MN | Subcontractor |
| Silicon Valley Optics Technology, Inc. | Fremont | CA | Subcontractor |
| Silva Cost Consulting, Inc. | Sacramento | CA | Subcontractor |
| Silverfine Eva | San Marcos | TX | $0 |
| Sitka Sound Science Center | Sitka | AK | $0 |
| Skayia Solutions Inc. | Fairfax | VA | Subcontractor |
| Skolnik Technical Training Institute, LLC | Albuquerque | NM | Subcontractor |
| Skyris LLC | Fairfax | VA | Subcontractor |
| Small Enterprise Assistance Funds | Washington | DC | Subcontractor |
| Smith Mark Andrew | Macon | GA | $0 |
| Snare Consulting LLC | Dumfries | VA | Subcontractor |
| Social Finance, Inc. | Boston | MA | Subcontractor |
| Social Venture Exchange Mexico, S.a.p.i. De C.v. | Benito Juarez | CMX | Subcontractor |
| Sol Oriens LLC | Albuquerque | NM | Subcontractor |
| Solstice Institute LLC | Los Angeles | CA | Subcontractor |
| Solutions Cubed, LLC | Chico | CA | $0 |
| Soundway Consulting, LLC | Anchorage | AK | Subcontractor |
| Source Surveillance Services, Inc. | Lake Park | FL | Subcontractor |
| South Carolina Health Information Partners, Inc. | Columbia | SC | $0 |
| South Dakota Safety Council | Sioux Falls | SD | $0 |
| South Dakota Science & Technology Authority | Lead | SD | Subcontractor |
| Southeast Techinventures Inc. | Arden | NC | $0 |
| Southern California Scientific, Inc. | Orange | CA | $0 |
| Southern District Reporters, P. C. | New York | NY | $0 |
| Southern States Energy Board | Peachtree Corners | GA | $0 |
| Space Metrics, Inc. | Gaithersburg | MD | Subcontractor |
| Spinel Inc. | Hamilton | VA | Subcontractor |
| Springboard Nonprofit Consumer Credit Management, Inc. | Riverside | CA | $0 |
| Sqa, Inc. | Ponte Vedra | FL | Subcontractor |
| Sqa Services, Inc. | Palos Verdes Estates | CA | Subcontractor |
| Sri International | Helena | MT | Subcontractor |
| Srivastava Shiva K | Potomac | MD | $0 |
| S&S Open Dev LLC | Washington | DC | Subcontractor |
| Star Isis Corporation | Lewis Center | OH | Subcontractor |
| Stateside Associates, LLC. | Arlington | VA | Subcontractor |
| Stephanie A. Reeves, Isa, Inc. | Houston | TX | $0 |
| Stephen Thomas Associates, L.L.C | Raleigh | NC | Subcontractor |
| Sterilization Technologies Equipment And Maintenance Inc. | Herriman | UT | $0 |
| Stockholm Environment Institute U.S., Inc. | Somerville | MA | Subcontractor |
| Stover & Associates LLC | Washington | DC | Subcontractor |
| Strategic Execution Alliance LLC | Santa Barbara | CA | Subcontractor |
| Strategic Innovation & Technology Enterprise Inc. | Burke | VA | Subcontractor |
| Strategic Technology Consulting Group LLC | Arlington | VA | Subcontractor |
| Sturbridge Metallurgical Services Inc. | Sturbridge | MA | $0 |
| Subc Control Limited | Clarenville | NL | Subcontractor |
| Subsurface Sensing Technologies And Consulting LLC | Tbilisi | | Subcontractor |
| Sue Binder Consulting, Inc. | Decatur | GA | $0 |
| Sullivan Analytics And Technical Services LLC | Oakton | VA | Subcontractor |
| Summit Federal Services LLC | Loch Lynn Heights | MD | Subcontractor |
| Sunshine Electric & Wireless LLC | Conway | SC | $0 |
| Superior Technical Services Inc. | Hillsboro | OR | $0 |
| Supportek Inc. | Denver | CO | Subcontractor |
| Susanne Wagner | Leonberg | | $0 |
| Susan Podziba | Brookline | MA | Subcontractor |
| Swifttech Logistics LLC | Frederick | MD | $0 |
| Swisscontact, Schweizerische Stiftung Fur Technische Entwicklungszusammenarbeit | Zurich | | Subcontractor |
| Sykesmore LLC | Urbana | IL | $0 |
| Synterex Inc. | Dedham | MA | Subcontractor |
| Systematic Technologies, LLC | Saint Petersburg | FL | $0 |
| Systemworks LLC | West Des Moines | IA | Subcontractor |
| Sytex, Inc. | Gaithersburg | MD | $0 |
| Tacitedge Ltd. | Arlington | VA | Subcontractor |
| T. A. Fischer, LLC | Ashburn | VA | Subcontractor |
| Tambourine Innovation Ventures Inc. | Vienna | VA | Subcontractor |
| Tampa Bay Estuary Program | Saint Petersburg | FL | $0 |
| Tango International Inc. | Tucson | AZ | Subcontractor |
| Targeted Solutions, LLC | Fredericksburg | VA | Subcontractor |
| Tarzanegy LLC | Fort Washington | MD | Subcontractor |
| Taurus Technologies, Inc. | Flower Mound | TX | $0 |
| Taz Technology, LLC | Mc Lean | VA | $0 |
| TDK Consulting PLLC | Glendale | AZ | $0 |
| Technical Surveillance Solutions LLC | Hockley | TX | $0 |
| Technology Revelations Inc. | Melbourne | FL | Subcontractor |
| Technoserve, Inc. | Arlington | VA | Subcontractor |
