| Garcia Sheet Metal Corporation Bending, Welding | Sacramento, CA | BendingWelding | - |
| Gartom CNC, Inc. Milling, Turning, Welding | Rochester, NY | MillingTurningWelding | - |
| Gem State Metals Bending, Welding | Garden City, ID | BendingWelding | - |
| Gene Davis Sales & Services Laser, Welding, Waterjet | Erie, PA | LaserWeldingWaterjet | - |
| GenX Machine Technologies Milling, Turning, Welding · AS9100 | Tulsa, OK | MillingTurningWelding | AS9100 |
| Gilberts Precision Machine Inc Milling, Turning, Bending, Welding · ISO 9001 | Las Vegas, NV | MillingTurningBendingWelding | ISO 9001 |
| GMP Welding & Fabrication, Inc. Bending, Welding | Cincinnati, OH | BendingWelding | - |
| Goodhart Sons Inc Bending, Welding, Casting | Lancaster, PA | BendingWeldingCasting | - |
| Grace Pacifica Machining Milling, Turning, Bending, Laser, Welding, Waterjet · ISO 9001, AS9100 | Tucson, AZ | MillingTurningBendingLaserWeldingWaterjet | ISO 9001, AS9100 |
| Great Lakes Pressed Steel Corporation Bending, Welding, Stamping | Buffalo, NY | BendingWeldingStamping | - |
| Grisham Industries Inc. Milling, Turning, Bending, Welding | Davenport, IA | MillingTurningBendingWelding | - |
| H & W Machine Repair & Rebuilding Milling, Turning, Welding | Fort Wayne, IN | MillingTurningWelding | - |
| H&H Metal Fabrication Bending, Welding | St. Louis, MO | BendingWelding | - |
| Hadley Precision Milling, Turning, Welding | Baton Rouge, LA | MillingTurningWelding | - |
| Halsey MFG Milling, Turning, Laser, Welding, Metal AM | Denton, TX | MillingTurningLaserWeldingMetal AM | - |
| Hamilton Machine Co. Milling, Turning, Bending, Welding | Nashville, TN | MillingTurningBendingWelding | - |
| Hammer MetalWerks Bending, Laser, Welding | Indianapolis, IN | BendingLaserWelding | - |
| Hanset Stainless Inc Welding | Portland, OR | Welding | - |
| Harbor Fab Welding | Fort Worth, TX | Welding | - |
| Harvey Brothers Inc Bending, Welding | Cincinnati, OH | BendingWelding | - |
| Hawk Welding & Fabrication Welding | Fort Worth, TX | Welding | - |
| Helix Metalworks Turning, Welding | Tulsa, OK | TurningWelding | - |
| Hennemuth Metal Fabricators Bending, Welding, Waterjet | Oakdale, PA | BendingWeldingWaterjet | - |
| Heyel Custom Metal Milling, Turning, Bending, Laser, Welding, Waterjet | Raleigh, NC | MillingTurningBendingLaserWeldingWaterjet | - |
| HG Metals Bending, Welding | Indianapolis, IN | BendingWelding | - |
| High Steel Structures LLC Welding | Lancaster, PA | Welding | - |
| Hitech Metalfab Inc Bending, Welding · ISO 9001 | Santa Clara, CA | BendingWelding | ISO 9001 |
| HMF Corporation Bending, Laser, Welding | Anaheim, CA | BendingLaserWelding | - |
| HollyFab Turning, Bending, Laser, Welding, Waterjet | Addison, TX | TurningBendingLaserWeldingWaterjet | - |
| Hybrid CNC Parts Welding, Metal AM · ISO 9001, AS9100, CMMC | Worcester, MA | WeldingMetal AM | ISO 9001, AS9100, CMMC |
| Industrial Fabricators Milling, Turning, Bending, Welding, Waterjet | Corpus Christi, TX | MillingTurningBendingWeldingWaterjet | - |
| Industrial Sales & Manufacturing, Inc. Milling, Turning, Bending, Laser, Welding · ISO 9001 | Erie, PA | MillingTurningBendingLaserWelding | ISO 9001 |
| Innovated Metal Fabrication, Inc Turning, Bending, Laser, Welding | Maplewood, MN | TurningBendingLaserWelding | - |
| Innovation Alley Milling, Turning, Bending, Welding | Fresno, CA | MillingTurningBendingWelding | - |
| IntoMetal Bending, Laser, Welding, Metal AM | Lincoln, NE | BendingLaserWeldingMetal AM | - |
| IPMI Manufacturing & Engineering Milling, Turning, Welding | Buckner, MO | MillingTurningWelding | - |
| IronStrong Metal Fabrication LLC Milling, Bending, Laser, Welding | Lancaster, PA | MillingBendingLaserWelding | - |
| J & L Sheet Metal Bending, Welding | Houston, TX | BendingWelding | - |
| J E Fifer Sheet Metal Fabricators Inc Bending, Laser, Welding | Richmond, VA | BendingLaserWelding | - |
| J.W. Steel Fabricating Co. Bending, Welding | Mars, PA | BendingWelding | - |
| Jaguar Precision Machine, LLC. Milling, Turning, Bending, Welding, Waterjet, Stamping, Metal AM · ISO 9001, AS9100, ITAR | Albuquerque, NM | MillingTurningBendingWeldingWaterjetStampingMetal AM | ISO 9001, AS9100, ITAR |
| JD Machine Milling, Turning, Bending, Welding, EDM · ISO 9001, AS9100, ITAR, CMMC | Ogden, UT | MillingTurningBendingWeldingEDM | ISO 9001, AS9100, ITAR, CMMC |
| Jerry's Welding & Machine Welding | San Diego, CA | Welding | - |
| Jet Speed Metals Bending, Welding | Westbrook, ME | BendingWelding | - |
| Jewett Machine Milling, Turning, Welding · ISO 9001 | Richmond, VA | MillingTurningWelding | ISO 9001 |
| John W. McDougall Co. Bending, Laser, Welding · ISO 9001 | Nashville, TN | BendingLaserWelding | ISO 9001 |
| Jones & Lockhart Fabrication LLC Bending, Welding | St. Louis, MO | BendingWelding | - |
| JP Metal Fabrication, Inc. Milling, Bending, Laser, Welding | Santa Clara, CA | MillingBendingLaserWelding | - |
| Just In Time Machine Corp Milling, Turning, Welding · AS9100, ITAR | Middleton, WI | MillingTurningWelding | AS9100, ITAR |
| KBM Industries Bending, Welding | Mechanicsburg, PA | BendingWelding | - |