| Columbia Machine Works, Inc Milling, Turning, Welding, Stamping, Casting · ISO 9001, ITAR | Columbia, TN | MillingTurningWeldingStampingCasting | ISO 9001, ITAR |
| Columbia Asc Inc Milling, Turning, Laser, Waterjet, Bending, Welding, Stamping, EDM · ISO 9001 | Lawrence, MA | MillingTurningLaserWaterjetBendingWeldingStampingEDM | ISO 9001 |
| Acutech Limited Liability Co Waterjet, Welding | Columbia Falls, MT | WaterjetWelding | - |
| Allied Industrial Machine Services Inc Milling, Turning, Welding, Grinding, Finishing | Falls Church, VA | MillingTurningWeldingGrindingFinishing | - |
| Baiar Industries Milling, Turning, Welding, EDM | Columbia Falls, MT | MillingTurningWeldingEDM | - |
| Compco Industries Laser, Welding, Stamping, Finishing · ISO 9001, ITAR | Columbiana, OH | LaserWeldingStampingFinishing | ISO 9001, ITAR |
| Deweys Service Company, LLC Laser, Welding, Grinding | Columbia, SC | LaserWeldingGrinding | - |
| Helanbak, LLC Milling, Turning, Waterjet, Welding | Columbia, MS | MillingTurningWaterjetWelding | - |
| Kilgore Manufacturing Co Inc Milling, Swiss, Bending, Welding, EDM, Finishing, Assembly · ISO 9001, ITAR | Columbia City, IN | MillingSwissBendingWeldingEDMFinishingAssembly | ISO 9001, ITAR |
| Laserform & Machine Inc Turning, Laser, Punching, Bending, Welding, Finishing, Assembly · ISO 9001 | Columbia, SC | TurningLaserPunchingBendingWeldingFinishingAssembly | ISO 9001 |
| Susquehanna Metal Work, LLC Milling, Bending, Welding, Stamping | Columbia, PA | MillingBendingWeldingStamping | - |
| ARC Fabricators Bending, Welding | Sioux Falls, SD | BendingWelding | - |
| Laser Metal Fabrication Laser, Bending, Welding, Assembly | Twin Falls, ID | LaserBendingWeldingAssembly | - |
| P&M Steel Company Welding | Sioux Falls, SD | Welding | - |
| Wisconsin Metal Fab LLC Milling, Laser, Punching, Bending, Welding | Chippewa Falls, WI | MillingLaserPunchingBendingWelding | - |