| KSKleeberg SheetMetal | Ludlow | 100–499 | ◐ LIKELY ACTIVE |
 Oerlikon Balzers Coating USA Inc - Agawam | Agawam | 20–99 | ◐ LIKELY ACTIVE |
| OBOMG Building Products LLC | Agawam | 500+ | ◐ LIKELY ACTIVE |
| PGPerma Graphics INC | Westfield | — | ◐ LIKELY ACTIVE |
| PMProfessional Machine Service, LLC | Holyoke | — | ◐ LIKELY ACTIVE |
| SSsc-ma | East Longmeadow | 20–99 | ◐ LIKELY ACTIVE |
| SBStanley Black and Decker | East Longmeadow | 500+ | ◐ LIKELY ACTIVE |
| TCThree-ten CORP. | Feeding Hills | — | ◐ LIKELY ACTIVE |
| BPBtd Precision, INC. | Chicopee | — | ◇ UNVERIFIED |
| ICInternational Container CO. LLC | Holyoke | — | ◇ UNVERIFIED |
| AMA.g. Miller Company, INC. | Springfield | — | ◇ UNVERIFIED |
| BMBerkshire Manufacturing Corporation | Southwick | — | ◇ UNVERIFIED |
| BEBroken Edge Deburring, INC. | West Springfield | — | ◇ UNVERIFIED |
| CFCarl Fisher Co., INC. | Springfield | — | ◇ UNVERIFIED |
| CKChalmers & Kubeck North | Westfield | — | ◇ UNVERIFIED |
| DMDelta Machine & Tool, INC. | Palmer | — | ◇ UNVERIFIED |
| EHEasco Hand Tools INC | Springfield | — | ◇ UNVERIFIED |
| EHEastern Heating & Sheet Metal | Chicopee | — | ◇ UNVERIFIED |
| FFFerguson Fire and Fabrication 1760 | Chicopee | — | ◇ UNVERIFIED |
| FRFior Realty | Agawam | — | ◇ UNVERIFIED |
| FNFormer North American Texturing | Chicopee | — | ◇ UNVERIFIED |
| GSGlobal Staffing Solutions, LLC | East Longmeadow | — | ◇ UNVERIFIED |
| HTHalpern Titanium, INC | Three Rivers | — | ◇ UNVERIFIED |
| HSHorizon Sheet Metal, INC. | Springfield | — | ◇ UNVERIFIED |
| IIIrwin Industrial Tool Company | East Longmeadow | — | ◇ UNVERIFIED |
| JPJp Precision INC | Chicopee | — | ◇ UNVERIFIED |
| LTLenox Tools | East Longmeadow | — | ◇ UNVERIFIED |
| LELent's Enterprises, INC. | Westfield | — | ◇ UNVERIFIED |
| MPMillennium Power Services, Inc. | Westfield | — | ◇ UNVERIFIED |
| NCNitor Corp | Southwick | — | ◇ UNVERIFIED |
| OBOerlikon Balzers Coating USA INC | Agawam | — | ◇ UNVERIFIED |
| OIOmg INC | Agawam | — | ◇ UNVERIFIED |
| OPOptimum Parts Company | Holyoke | — | ◇ UNVERIFIED |
| PTPatton Tool Company | Westfield | — | ◇ UNVERIFIED |
| PVPioneer Valley Plating | Holyoke | — | ◇ UNVERIFIED |
| PCPrecision Components Group Inc | West Springfield | — | ◇ UNVERIFIED |
| PCPrecision Components Group INC. | West Springfield | — | ◇ UNVERIFIED |
| QMQual-tech Mfg., INC | Westfield | — | ◇ UNVERIFIED |
| RMRose Metal Works, INC | Chicopee | — | ◇ UNVERIFIED |
| SEScreaming Eagle Machine Corp. | West Springfield | — | ◇ UNVERIFIED |
| SGSharp Grinding CO INC | West Springfield | — | ◇ UNVERIFIED |
| SBSpecialty Bolt & Screw, INC. | Agawam | — | ◇ UNVERIFIED |
| SMSpringdale Machine & Gear, Inc. | Holyoke | — | ◇ UNVERIFIED |
| SCSummit Careers INC | East Longmeadow | — | ◇ UNVERIFIED |
| TDThe Duc-pac CORP | East Longmeadow | — | ◇ UNVERIFIED |
| TMThin Metal Ventures INC. | Springfield | — | ◇ UNVERIFIED |
 Troy Industries INC | West Springfield | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Agawam | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | Springfield | — | ◇ UNVERIFIED |
| UOUsdol - Osha Springfield Area Office | West Springfield | — | ◇ UNVERIFIED |
