| Lubriport Laboratories, Inc. | Kenner | LA | Subcontractor |
| Magnet-physics Incorporated | Indianapolis | IN | Subcontractor |
| Mandina's Inspection Services, Inc. | Belle Chasse | LA | Subcontractor |
| Materials And Chemistry Laboratory, Inc. | Oak Ridge | TN | Subcontractor |
| Materials Engineering And Testing Corporation | Oak Ridge | TN | Subcontractor |
| Material Testing Services, L.L.C. | Minot | ND | Subcontractor |
| Matriscope Engineering Laboratories, Inc. | Sacramento | CA | Subcontractor |
| Mcclelland Laboratories, Inc. | Sparks | NV | $0 |
| Mckinney Specialty Labs, LLC | Henrico | VA | Subcontractor |
| Medical Equipment Compliance Associates, LLC | Oak Creek | WI | Subcontractor |
| Merrell Johnson Geotechnical, Inc. | Apple Valley | CA | Subcontractor |
| Mesa3 / Mechanical Environmental Systems Analysis And Adjustment Agency, Inc. | San Jose | CA | Subcontractor |
| Metal Improvement Company, LLC | Louisville | KY | $0 |
| Metrocal, Inc. | Grand Rapids | MI | $0 |
| Metro-diversified Laboratories Inc. | Westchester | IL | $0 |
| Metropolitan Solutions Group, Inc. A Nevada Corporation | Portsmouth | VA | Subcontractor |
| Mga Research Corporation | Irving | TX | Subcontractor |
| Micro Air, Inc. | Indianapolis | IN | $0 |
| Micro Analytical Inc. | Milwaukee | WI | $0 |
| Microstar Lab Ltd. | Crystal Lake | IL | $0 |
| Mid South Calibration LLC | Cordova | TN | $0 |
| Midwest Engineering And Testing Corporation | Oklahoma City | OK | Subcontractor |
| Mile High Resources LLC | Sierra Blanca | TX | Subcontractor |
| Millennium Bioresearch, Inc. | Spinnerstown | PA | $0 |
| Minnesota Valley Testing Laboratories,inc. | Bismarck | ND | $0 |
| Mistras Group Inc. | New Kensington | PA | $0 |
| Mistras Group, Inc.Memphis, TN · UEI KQW1YKECM814 | Memphis | TN | Subcontractor |
| Mistras Group, Inc.Jacksonville, FL · UEI MNU9US37VZG7 | Jacksonville | FL | Subcontractor |
| Mistras Group, Inc.Burlington, WA · UEI N8DAXK7KXKM8 | Burlington | WA | Subcontractor |
| Mistras Group, Inc.Auburn, MA · UEI QQ4GSQN9WCB4 | Auburn | MA | $0 |
| Mobilab Environmental Determinations, USA, L.L.C. | San Diego | CA | Subcontractor |
| Mobile Instrument Co. Inc. | Mobile | AL | $0 |
| MTGL Inc. | San Diego | CA | Subcontractor |
| Mt Group, LLC | Arlington Heights | IL | Subcontractor |
| Muepsln LLC | Chadds Ford | PA | Subcontractor |
| Music City Precision LLC | Nashville | TN | Subcontractor |
| Mva Scientific Consultants, Inc. | Duluth | GA | Subcontractor |
| Nanoimaging Services, Inc. | San Diego | CA | Subcontractor |
| Nansei Environmental Laboratory Co. Ltd. | Nakagami-gun | OKINAWA | $0 |
| National Exposure Testing Inc. | Sylvania | OH | $0 |
| Nautilus Environmental, Inc. | San Diego | CA | Subcontractor |
| NDT Consultancy Services, Inc. | Houston | TX | $0 |
| NDT Consulting Group Inc. | Miramar Beach | FL | $0 |
| Ndt-solutions, Inc. | Hollywood | FL | $0 |
| NDT Xl LLC | Palatka | FL | Subcontractor |
| New England Testing Laboratory Inc. | West Warwick | RI | $0 |
| New York State Lineman's Safety Training Fund | Cicero | NY | $0 |
| Noble Life Sciences, Inc. | Sykesville | MD | $0 |
| Noedel Scientific LLC | Eatonville | WA | $0 |
| North Star Imaging, Inc. | Orlando | FL | Subcontractor |
| Northwest Inspection, Inc. | Kennewick | WA | $0 |
| NTS Labs LLC | Wichita | KS | $0 |
| NTS Labs, LLCMount Prospect, IL · UEI DNBDAQZ6W4M8 | Mount Prospect | IL | Subcontractor |
| NTS Labs, LLCLongmont, CO · UEI F5RGHGLNN297 | Longmont | CO | Subcontractor |
| NTS Labs, LLCTempe, AZ · UEI RG4XNHDWRDD8 | Tempe | AZ | Subcontractor |
| Nucro-technics, Inc. | Scarborough | ON | Subcontractor |
| Nutherm International Inc. | Mount Vernon | IL | Subcontractor |
| Oahu Lab Testing And Compliance LLC | Aiea | HI | Subcontractor |
| Ogden Engineering & Associates LLC | Tucson | AZ | Subcontractor |
| Omega Laboratories Inc. | Mogadore | OH | $0 |
| Oncolead GMBH & Co. Kg | Karlsfeld | | $0 |
| Otto Rosenau & Associates, Inc. | Seattle | WA | $0 |
| Outgassing Services Intl | Mountain View | CA | Subcontractor |
| Pacific Power Testing, Inc. | San Leandro | CA | Subcontractor |
| Pacific Testing Laboratories | Valencia | CA | $0 |
| Paragon Laboratories Inc. | Livonia | MI | $0 |
| Partek Laboratories, Inc. | Houma | LA | $0 |
| Pathogen Control Associates Inc. | Peachtree Corners | GA | $0 |
| PDC Laboratories Inc. | Peoria | IL | $0 |
| Pharmchem Inc. | Fort Worth | TX | $0 |
| Phoenix Environmental Laboratories Inc. | Manchester | CT | Subcontractor |
| Phoenix National Laboratories, LLC | Tempe | AZ | Subcontractor |
| Pikes Peak Test Labs, Inc. | Colorado Springs | CO | Subcontractor |
| Plains Environmental Services, Inc. | Salina | KS | Subcontractor |
| Polaris Laboratories LLC | Indianapolis | IN | $0 |
| Polyanalytik Inc. | London | ON | $0 |
| Portrett Pharmaceuticals LLC | Wilmington | NC | $0 |
| Precision Analytical Laboratories LLC | Everett | WA | Subcontractor |
| Preferred Testing Labs Inc. | Anaheim | CA | Subcontractor |
| Prima Environmental Inc. | El Dorado Hills | CA | Subcontractor |
| Professional NDT Services Inc. | Trujillo Alto | PR | Subcontractor |
| Pti Industries, Inc. | Enfield | CT | Subcontractor |
| Q.c. Metallurgical Laboratory, Inc. | Davenport | IA | $0 |
| Qronus8 Corporation | Tamuning | GU | Subcontractor |
| Qti Services LLC | Latrobe | PA | $0 |
| Quality Assurance Engineering, Inc. | San Ramon | CA | Subcontractor |
| Quality Metrology Systems & Solutions, LLC | Beavercreek | OH | Subcontractor |
| Quanta Laboratories | Santa Clara | CA | Subcontractor |
| Radiation Safety Engineering, Inc. | Chandler | AZ | $0 |
| Radiation Solutions, LLC | Sugar City | ID | $0 |
| Radon Detection Specialists Inc. | Westmont | IL | Subcontractor |
| R&B Laboratory, Inc. | Conshohocken | PA | Subcontractor |
| Reinhart & Associates, Inc. | Pflugerville | TX | $0 |
| Retlif Inc. | Ronkonkoma | NY | Subcontractor |
| RNDT, Inc. | Johnstown | PA | $0 |
| Robisan Laboratory Inc. | Indianapolis | IN | Subcontractor |
| Sage Analytical Lab LLC | San Diego | CA | $0 |
| Sanair Technologies Laboratory, Inc. | North Chesterfield | VA | Subcontractor |
| Scientific Control Laboratories, Limited | Chicago | IL | $0 |
| Scientific Equipment Repair Company | Fort Collins | CO | $0 |
