| Scientific Technical, Inc. | Chesapeake | VA | Subcontractor |
| SDK Laboratories Inc. | Hutchinson | KS | $0 |
| Seismic Surveys, LLC | Frederick | MD | Subcontractor |
| Selima Partners, LLC | Orlando | FL | Subcontractor |
| Sentinel Integrity Solutions, Inc. | Houston | TX | $0 |
| SGS North America Inc. | Orlando | FL | Subcontractor |
| Shermco Industries, Inc. | Auburn | WA | Subcontractor |
| Shots-m-stuff Testing LLC | Rising Sun | MD | Subcontractor |
| Simco Electronics | Panorama City | CA | $0 |
| Siouxland Certified Testing Services Inc. | Sioux City | IA | $0 |
| Si-rel, Inc. | Chelmsford | MA | Subcontractor |
| Skarshaug Testing Laboratory, Inc. | Ames | IA | $0 |
| Sky Testing Services, Inc. | East Syracuse | NY | Subcontractor |
| S M I, Inc. | Miami | FL | $0 |
| Smith-emery Of San Francisco, Inc. | San Francisco | CA | Subcontractor |
| Sonic Inspection Corp. | Oklahoma City | OK | Subcontractor |
| Southeastern Testing Laboratory, Inc. | Bishop | GA | $0 |
| Southern Inspection And Testing, Inc. | Harvey | LA | $0 |
| Specialized Testing, Inc. | Santa Fe Springs | CA | Subcontractor |
| Special Testing Laboratories Inc. | Bethel | CT | Subcontractor |
| Speedie & Associates LLC | Phoenix | AZ | Subcontractor |
| Spray Research, Inc. | Shutesbury | MA | $0 |
| Stan A. Huber Consultants, Inc. | New Lenox | IL | Subcontractor |
| Standard Laboratories Inc. | Scott Depot | WV | $0 |
| Standard Testing Services, Inc. | Tamuning | GU | Subcontractor |
| Sterling Performance, Inc. | Milford | MI | $0 |
| Suburban Testing Labs, LLC | Reading | PA | $0 |
| Sullivan & Associates Inc. | Ladson | SC | $0 |
| Suntrac Services, Inc. | League City | TX | $0 |
| Tandex Test Labs, Inc. | Baldwin Park | CA | Subcontractor |
| Taurus Power Services LLC | Longview | WA | Subcontractor |
| Team Torque Inc. | Bismarck | ND | $0 |
| Ten-e Packaging Services Inc. | Newport | MN | $0 |
| Test Systems, Inc. | Phoenix | AZ | $0 |
| Texas Meter And Device Company, LLC | Woodway | TX | $0 |
| The M&P Lab, Inc. | Schenectady | NY | Subcontractor |
| Thermal Moisture Imaging, LLC | Willow Grove | PA | Subcontractor |
| TJ/H2B Analytical Services Incorporated | Sacramento | CA | $0 |
| T.m.d.e. Calibration Labs, Inc. | Richmond | ME | $0 |
| Trace Analytical Laboratories, Inc. | Muskegon | MI | Subcontractor |
| Tri-state Sales & Service, Inc. | Ormond Beach | FL | $0 |
| Tsi Laboratories, Inc. | Victoria | TX | $0 |
| Tsoumar Inc. | Jacksonville | FL | $0 |
| Tuv Rheinland Of North America, Inc. | Boxborough | MA | Subcontractor |
| Ultrasonic Scanning Services LLC | Denver | CO | $0 |
| Ultra Technic Services Inc. | West Chester | OH | $0 |
| Umpqua Testing Service, LLC | Myrtle Creek | OR | $0 |
| United Power Services, Inc. | Nashville | TN | $0 |
| Unitek Technical Services, Inc. | Centreville | VA | Subcontractor |
| Utility Service Corporation Of Huntsville | Huntsville | AL | Subcontractor |
| Vas Consulting LLC | Seattle | WA | $0 |
| Vexa Group, LLC | Wixom | MI | $0 |
| Vibracon | Port Hueneme | CA | $0 |
| Volunteer NDT Corporation | Chattanooga | TN | $0 |
| Washington Calibration, LLC | Tempe | AZ | Subcontractor |
| Washington Laboratories Ltd. | Frederick | MD | Subcontractor |
| Waterlab Corp. | Salem | OR | $0 |
| Wearcheck Lubrication Services LLC | Boca Raton | FL | $0 |
| Western Ag Innovations Inc. | Saskatoon | SK | $0 |
| Westinghouse Electric Company, LLC | Pittsburgh | PA | $0 |
| Whitaker Laboratory, Inc. | Savannah | GA | Subcontractor |
| Wingerter Laboratories Inc. | North Miami | FL | $0 |
| Wings Testing & Balancing Co. Inc. | Branford | CT | $0 |
| Woods End Laboratories LLC | Augusta | ME | $0 |
| X-ray Industries, Inc. | Troy | MI | $0 |
| York Analytical Laboratories, Inc. | Stratford | CT | Subcontractor |
| York Laboratories LLC | York | PA | $0 |
| York Scientific Inc. | Scottsdale | AZ | $0 |
| Zf Passive Safety Systems US, LLC | Washington | MI | Subcontractor |
| Analytical Environmental Services International Inc. | San Juan | PR | Subcontractor |
| Mccrone Group, Inc. | Westmont | IL | −$1,500 |
| Bowser-morner, Inc. | Dayton | OH | Subcontractor |
| Applied Inspection Systems Inc. | Benton | AR | −$2,096 |
| Spectra Laboratories, LLC | Fife | WA | Subcontractor |
| Clark Laboratories LLC | Jefferson Hills | PA | −$3,800 |
| Arl Bio Pharma Inc. | Oklahoma City | OK | −$4,450 |
| Phase Separation Science Inc. | Catonsville | MD | −$4,800 |
| The New Mexico Water Testing Laboratory Inc. | Espanola | NM | −$5,311 |
| Lubecky Joseph | Benton | KY | −$5,850 |
| Kansas City Testing & Engineering LLC | Kansas City | KS | Subcontractor |
| Element Materials Technology Los Angeles LLC | Duarte | CA | Subcontractor |
| Mga Research Corporation | Greer | SC | −$10.5K |
| Reliability Maintenance Services, Inc. | Tinton Falls | NJ | −$11.4K |
| Cte, Cal, Inc. | North Highlands | CA | Subcontractor |
| R & D Services, Inc. | Watertown | TN | −$15.4K |
| Airscan Technologies, Inc. | Springtown | TX | −$16.3K |
| Copper State Water LLC | Fountain Hills | AZ | −$16.5K |
| Alamo Analytical Laboratories, Ltd. | San Antonio | TX | −$17.1K |
| Air Technology Laboratories, Inc. | City Of Industry | CA | Subcontractor |
| Galbraith Laboratories, Inc. | Knoxville | TN | Subcontractor |
| Challenge Testing, Inc. | Mobile | AL | Subcontractor |
| Precision Measurement Inc. | Fort Walton Beach | FL | Subcontractor |
| BSK Associates | Fresno | CA | Subcontractor |
| Legend Technical Services, Inc. | Saint Paul | MN | −$54.5K |
| Zjo Enterprises, LLC | Virginia Beach | VA | Subcontractor |
| Lonestar Technical Services LLC | Dubai | DUBAI | Subcontractor |
| Sorenson Forensics LLC | Draper | UT | −$70K |
| Fire & Materials Research Laboratory LLC | Livonia | MI | −$70.7K |
| Power Solutions Group, LLC | Tipp City | OH | Subcontractor |
| Colorado Engineering Experiment Station Inc. | Nunn | CO | Subcontractor |
