| Flint Cliffs Manufacturing Corp Milling, Turning, Laser, Bending, Welding, Stamping, Finishing · ISO 9001 | Burlington, IA | MillingTurningLaserBendingWeldingStampingFinishing | ISO 9001 |
| Machine Tool Engineering Milling, Turning, Swiss, Laser, Waterjet, Stamping, EDM, Grinding, Finishing · ISO 9001, AS9100, NADCAP | Charles City, IA | MillingTurningSwissLaserWaterjetStampingEDMGrindingFinishing | ISO 9001, AS9100, NADCAP |
| Acro Manufacturing Corporation Milling, Turning, Welding · ISO 9001 | Cedar Rapids, IA | MillingTurningWelding | ISO 9001 |
| Advance Machine Technologies, Inc. Milling, Turning, Bending, Welding, Waterjet · ISO 9001 | Johnston, IA | MillingTurningBendingWeldingWaterjet | ISO 9001 |
| Douglas Machine & Engineering Milling, Turning, Bending, Welding, EDM · ISO 9001, AS9100, ITAR, CMMC | Davenport, IA | MillingTurningBendingWeldingEDM | ISO 9001, AS9100, ITAR, CMMC |
| DW Products Milling, Turning, Bending, Welding, Waterjet · ISO 9001, ITAR | Cedar Rapids, IA | MillingTurningBendingWeldingWaterjet | ISO 9001, ITAR |
| In Tolerance Contract Manufacturing Milling, Turning, Bending · ISO 9001, AS9100, NADCAP | Cedar Rapids, IA | MillingTurningBending | ISO 9001, AS9100, NADCAP |
| 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 |
| Superior Tooling Inc Milling, Turning, Swiss, Bending, Welding, Stamping, EDM, Grinding · ISO 9001 | Wapello, IA | MillingTurningSwissBendingWeldingStampingEDMGrinding | ISO 9001 |
| Technical Services Incorporated Milling, Turning, Welding · ISO 9001 | Ames, IA | MillingTurningWelding | ISO 9001 |
| Tecton Industries Inc Milling, Turning, Casting, Grinding · ISO 9001, AS9100 | Spencer, IA | MillingTurningCastingGrinding | ISO 9001, AS9100 |
| True Position Manufacturing Inc Turning, Welding · ISO 9001 | Davenport, IA | TurningWelding | ISO 9001 |
| Valley Machining Co Milling, Turning, Welding, Grinding · ISO 9001, ITAR | Rock Valley, IA | MillingTurningWeldingGrinding | ISO 9001, ITAR |
| Plas-Tech Tooling Inc Milling, Turning, Welding, Finishing, Assembly | Garner, IA | MillingTurningWeldingFinishingAssembly | - |
| Criterion Manufacturing Turning, Welding | Waterloo, IA | TurningWelding | - |
| Huffman Welding & Machine Inc Milling, Turning, Laser, Waterjet, Bending, Welding, EDM, Grinding, Finishing, Assembly · ISO 9001 | Fort Madison, IA | MillingTurningLaserWaterjetBendingWeldingEDMGrindingFinishingAssembly | ISO 9001 |
| Rosko Manufacturing Milling, Turning, Metal AM | Grimes, IA | MillingTurningMetal AM | - |
| Ameritec Machining, Inc Milling, Turning · ISO 9001 | New Hampton, IA | MillingTurning | ISO 9001 |
| Blackhawk Engineering LLC Milling, Turning · ISO 9001, ITAR | Cedar Falls, IA | MillingTurning | ISO 9001, ITAR |
| Seaberg Industries Turning, Bending, Laser, Welding · ISO 9001 | Davenport, IA | TurningBendingLaserWelding | ISO 9001 |
| B&K Machining LLC Milling, Turning, Welding | Centerville, IA | MillingTurningWelding | - |
| Cedar Industries, Inc Turning, Bending | Waterloo, IA | TurningBending | - |
| Grisham Industries Inc. Milling, Turning, Bending, Welding | Davenport, IA | MillingTurningBendingWelding | - |
| M's Machines Milling, Turning, Welding | Monona, IA | MillingTurningWelding | - |