| Pride Metal Works LLC Bending, Welding | Helena, MT | BendingWelding | - |
| Rig Machine Works LLC Milling, Turning, Bending, Welding, Grinding | Stevensville, MT | MillingTurningBendingWeldingGrinding | - |
| Acutech Limited Liability Co Waterjet, Welding | Columbia Falls, MT | WaterjetWelding | - |
| 5G Modular MT, LLC Welding | Laurel, MT | Welding | - |
| Baiar Industries Milling, Turning, Welding, EDM | Columbia Falls, MT | MillingTurningWeldingEDM | - |
| Gray Machine Company LLC Welding | Billings, MT | Welding | - |
| Lucent Manufacturing LLC Welding | Billings, MT | Welding | - |
| Samss Refacer, Inc Milling, Turning, Waterjet | Laurel, MT | MillingTurningWaterjet | - |
| Thompson Precision Inc Milling, Turning, Welding · AS9100 | Kalispell, MT | MillingTurningWelding | AS9100 |
| Vorteque LLC Milling, Turning, Waterjet, Bending, Welding | Missoula, MT | MillingTurningWaterjetBendingWelding | - |
| Autopilot Inc Milling, Turning, Finishing | Bozeman, MT | MillingTurningFinishing | - |
| Bozeman CNC LLC Milling, Laser, Finishing · ISO 9001, AS9100, ITAR | Manhattan, MT | MillingLaserFinishing | ISO 9001, AS9100, ITAR |
| CM Manufacturing Inc Milling, Turning · ISO 9001, AS9100, ITAR | Missoula, MT | MillingTurning | ISO 9001, AS9100, ITAR |
| Compatible Manufacturing, Inc Milling · ISO 9001, AS9100 | Marion, MT | Milling | ISO 9001, AS9100 |
| Harlyn Jean Machining LLC Milling · AS9100, ITAR | Columbia Falls, MT | Milling | AS9100, ITAR |