| American Waterjet Cutting LLC Milling, Waterjet, Finishing | Winfield, IA | MillingWaterjetFinishing | - |
| BT Machine and Fabrication, LLC Welding | Elkhart, IA | Welding | - |
| Advance Machine Technologies, Inc. Milling, Turning, Bending, Welding, Waterjet · ISO 9001 | Johnston, IA | MillingTurningBendingWeldingWaterjet | ISO 9001 |
| Blackhawk Engineering LLC Milling, Turning · ISO 9001, ITAR | Cedar Falls, IA | MillingTurning | ISO 9001, ITAR |
| DAD Manufacturing, Inc. Bending, Welding · ISO 9001 | Hiawatha, IA | BendingWelding | ISO 9001 |
| Des Moines Metal Fab Bending, Laser, Welding | Des Moines, IA | BendingLaserWelding | - |
| Huffman Welding & Machine Inc Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Fort Madison, IA | MillingTurningLaserWaterjetBendingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Iowa Metal Spinners Milling, Turning, Laser, Welding, Stamping · ISO 9001 | Cedar Falls, IA | MillingTurningLaserWeldingStamping | ISO 9001 |
| Master Tool & Manufacturing Inc Turning, Bending, Welding, EDM, Grinding · ISO 9001, ITAR | Hiawatha, IA | TurningBendingWeldingEDMGrinding | ISO 9001, ITAR |
| Seaberg Industries Turning, Bending, Laser, Welding · ISO 9001 | Davenport, IA | TurningBendingLaserWelding | ISO 9001 |
| Summit Products Inc Milling, Bending, Welding, Finishing | Altoona, IA | MillingBendingWeldingFinishing | - |
| Tri-State Sheet Metal, Inc Bending, Welding | Keokuk, IA | BendingWelding | - |
| True Position Manufacturing Inc Turning, Welding · ISO 9001 | Davenport, IA | TurningWelding | ISO 9001 |