| Cutting Edge Machining & Automation-Qtr, LLC Milling, Turning, Swiss, Laser, Welding, EDM, Assembly | North Versailles, PA | MillingTurningSwissLaserWeldingEDMAssembly | - |
| Experimental Machine Inc Milling, Waterjet, Welding, Assembly · ISO 9001, AS9100, ITAR, CMMC | New Freedom, PA | MillingWaterjetWeldingAssembly | ISO 9001, AS9100, ITAR, CMMC |
| H R Edgar Machining & Fabricating, Inc Milling, Turning, Waterjet, Welding · ISO 9001 | New Kensington, PA | MillingTurningWaterjetWelding | ISO 9001 |
| Q Company, LLC Milling, Turning, Welding, Grinding, Finishing · ISO 9001, AS9100, ITAR | New Berlin, PA | MillingTurningWeldingGrindingFinishing | ISO 9001, AS9100, ITAR |
| Accrotool, Inc Milling, Turning, Laser, Punching, Bending, Welding, Stamping, Finishing, Assembly | New Kensington, PA | MillingTurningLaserPunchingBendingWeldingStampingFinishingAssembly | - |
| Alkab Machine Milling, Turning, Welding, Assembly | New Kensington, PA | MillingTurningWeldingAssembly | - |
| Custom Engineering Co Milling, Turning, Bending, Welding · ISO 9001, ITAR, NADCAP | Erie, PA | MillingTurningBendingWelding | ISO 9001, ITAR, NADCAP |
| Merit Industries Milling, Turning, Laser, Waterjet, Welding, EDM, Grinding, Finishing · AS9100, ITAR, NADCAP, CMMC | Erie, PA | MillingTurningLaserWaterjetWeldingEDMGrindingFinishing | AS9100, ITAR, NADCAP, CMMC |
| Niagara Manufacturing Co Milling, Turning, Bending, Welding | Erie, PA | MillingTurningBendingWelding | - |
| AllPro Stainless Steel and Metal Fabrication Welding | Philadelphia, PA | Welding | - |
| Anderson Metal Industries Inc Milling, Turning, Welding, EDM, Grinding, Finishing · ISO 9001, ITAR | Franklin, PA | MillingTurningWeldingEDMGrindingFinishing | ISO 9001, ITAR |
| Anvil Iron Works Welding | Philadelphia, PA | Welding | - |
| Astro Machine Works Milling, Turning, Welding, Assembly · ISO 9001, CMMC | Ephrata, PA | MillingTurningWeldingAssembly | ISO 9001, CMMC |
| B-Tec Solutions Inc Milling, Turning, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, AS9100 | Croydon, PA | MillingTurningWeldingStampingEDMGrindingAssembly | ISO 9001, AS9100 |
| BCL Manufacturing Inc Laser, Punching, Welding | Windber, PA | LaserPunchingWelding | - |
| Bear Ridge Mach & Fab Inc Milling, Laser, Waterjet, Punching, Bending, Welding, Grinding | Frackville, PA | MillingLaserWaterjetPunchingBendingWeldingGrinding | - |
| Bec Machine Products Milling, Turning, Welding, Casting | Harleysville, PA | MillingTurningWeldingCasting | - |
| Beers Tooling and Machining Milling, Turning, Welding, Finishing · ISO 9001 | Jim Thorpe, PA | MillingTurningWeldingFinishing | ISO 9001 |
| Billet Industries Inc Milling, Turning, Laser, Welding, EDM, Grinding, Assembly · AS9100 | York, PA | MillingTurningLaserWeldingEDMGrindingAssembly | AS9100 |
| Butler Precision Technologies LLC Milling, Turning, Welding, Finishing · AS9100, ITAR | Bristol, PA | MillingTurningWeldingFinishing | AS9100, ITAR |
| CNC Specialties Manufacturing Inc Milling, Turning, Bending, Welding, EDM, Grinding, Finishing | Apollo, PA | MillingTurningBendingWeldingEDMGrindingFinishing | - |
| Critical Defense Inc Milling, Turning, Bending, Welding, Grinding, Assembly | Windber, PA | MillingTurningBendingWeldingGrindingAssembly | - |
| Danco Precision, Inc Milling, Turning, Laser, Welding, Stamping, EDM, Grinding, Assembly · ISO 9001, AS9100, ITAR | Phoenixville, PA | MillingTurningLaserWeldingStampingEDMGrindingAssembly | ISO 9001, AS9100, ITAR |
| Dixon Tool & Die Co Inc Milling, Turning, Waterjet, Welding, EDM, Grinding · ISO 9001, CMMC | Tyrone, PA | MillingTurningWaterjetWeldingEDMGrinding | ISO 9001, CMMC |
| Donsco, Inc Milling, Welding, Casting | Wrightsville, PA | MillingWeldingCasting | - |
| Dynamic Metal Innovations LLC Laser, Bending, Welding, Finishing, Assembly · ITAR | Emmaus, PA | LaserBendingWeldingFinishingAssembly | ITAR |
| Elsner Engineering Works Inc Milling, Turning, Welding, EDM, Grinding · ISO 9001 | Hanover, PA | MillingTurningWeldingEDMGrinding | ISO 9001 |
| Emb Machining Services Inc Milling, Turning, Bending, Welding, Grinding, Assembly · ISO 9001, ITAR | Whitney, PA | MillingTurningBendingWeldingGrindingAssembly | ISO 9001, ITAR |
| Excell Industries Milling, Turning, Swiss, Welding · ISO 9001 | Chambersburg, PA | MillingTurningSwissWelding | ISO 9001 |
| F.B.F., Inc Laser, Punching, Bending, Welding, Stamping, Assembly · ISO 9001 | Southampton, PA | LaserPunchingBendingWeldingStampingAssembly | ISO 9001 |
| Gene Davis Sales & Services Laser, Welding, Waterjet | Erie, PA | LaserWeldingWaterjet | - |
| Global Affinity Inc Laser, Bending, Welding | Bristol, PA | LaserBendingWelding | - |
| Goodhart Sons Inc Bending, Welding, Casting | Lancaster, PA | BendingWeldingCasting | - |
| Grand Valley Manufacturing Co Milling, Turning, Bending, Welding | Titusville, PA | MillingTurningBendingWelding | - |
| Hard Chrome Specialists, Inc Bending, Welding, Grinding, Finishing · ISO 9001 | York, PA | BendingWeldingGrindingFinishing | ISO 9001 |
| Hards Fabrication & Welding, Inc Milling, Turning, Waterjet, Bending, Welding | Seneca, PA | MillingTurningWaterjetBendingWelding | - |
| I Auman Machine Co Inc Milling, Turning, Welding | Lebanon, PA | MillingTurningWelding | - |
| IronStrong Metal Fabrication LLC Milling, Bending, Laser, Welding | Lancaster, PA | MillingBendingLaserWelding | - |
| Irwin Automation Inc Milling, Turning, Welding, EDM, Grinding | Greensburg, PA | MillingTurningWeldingEDMGrinding | - |
| J.B. Anderson & Son, Inc Milling, Turning, Welding, Assembly | Irwin, PA | MillingTurningWeldingAssembly | - |
| Jeglinski Group Inc Milling, Turning, Welding, EDM, Grinding, Assembly · ISO 9001 | Meadville, PA | MillingTurningWeldingEDMGrindingAssembly | ISO 9001 |
| KBM Industries Bending, Welding | Mechanicsburg, PA | BendingWelding | - |
| King Precision Solutions Milling, Turning, Welding, EDM · ISO 9001, ITAR | Erie, PA | MillingTurningWeldingEDM | ISO 9001, ITAR |
| Kiski Precision Industries, LLC Milling, Turning, Welding, Assembly | Leechburg, PA | MillingTurningWeldingAssembly | - |
| Kuhn Tool & Die Co Milling, Waterjet, Welding, Stamping, EDM, Grinding | Meadville, PA | MillingWaterjetWeldingStampingEDMGrinding | - |
| Lamjen Inc Milling, Turning, Welding, Stamping, Casting · ISO 9001 | Erie, PA | MillingTurningWeldingStampingCasting | ISO 9001 |
| Lawruk Machine & Tool Milling, Turning, Welding, Grinding · ISO 9001 | Altoona, PA | MillingTurningWeldingGrinding | ISO 9001 |
| Leese & Co Inc Welding, EDM · ISO 9001 | Greensburg, PA | WeldingEDM | ISO 9001 |
| Leister Machine LLC Milling, Welding | Bedford, PA | MillingWelding | - |
| M & B Machine, Inc Milling, Turning, Swiss, Welding · ISO 9001, AS9100, CMMC | Carlisle, PA | MillingTurningSwissWelding | ISO 9001, AS9100, CMMC |