| Seattle Makers Laser, Welding, Metal AM | Seattle, WA | LaserWeldingMetal AM | - |
| Ballard Marine Fabricators Welding | Seattle, WA | Welding | - |
| Diamond Machine Works, Inc. Milling, Turning · ISO 9001, AS9100 | Seattle, WA | MillingTurning | ISO 9001, AS9100 |
| Feryok & Clarkson Machine and Marine Milling, Turning, Laser, Welding, Waterjet | Seattle, WA | MillingTurningLaserWeldingWaterjet | - |
| Rainier Metal Works Bending, Welding | Seattle, WA | BendingWelding | - |
| Washington Machine Works Milling, Turning, Bending, Welding · ISO 9001 | Seattle, WA | MillingTurningBendingWelding | ISO 9001 |
| Alaskan Copper Works Bending, Welding, Waterjet | Seattle, WA | BendingWeldingWaterjet | - |
| Argent Fabrication LLC Bending, Welding | Seattle, WA | BendingWelding | - |
| Atomic Fabrications LLC. Welding | Seattle, WA | Welding | - |
| Ballard Sheet Metal Works Inc. Bending, Welding | Seattle, WA | BendingWelding | - |
| Future Present Labs Milling, Turning, Laser, Welding, Waterjet, Metal AM | Seattle, WA | MillingTurningLaserWeldingWaterjetMetal AM | - |
| Modern Machine Milling, Turning, Bending, Welding, Stamping | Seattle, WA | MillingTurningBendingWeldingStamping | - |
| Pacific Architectural Metals LLC Bending, Laser, Welding | Seattle, WA | BendingLaserWelding | - |
| Pacific Northwest Metal Fabricators Turning, Welding, Waterjet | Seattle, WA | TurningWeldingWaterjet | - |
| Redstone Manufacturing USA Milling, Bending, Laser, Welding, Stamping, Casting · ISO 9001, AS9100, IATF 16949 | Seattle, WA | MillingBendingLaserWeldingStampingCasting | ISO 9001, AS9100, IATF 16949 |