| Excel Machine & Fabrication Inc Milling, Turning, Swiss, Welding | Baltimore, MD | MillingTurningSwissWelding | - |
| Combs Enterprises Incorporated Milling, Turning, Bending, Welding, Finishing · ITAR | Great Mills, MD | MillingTurningBendingWeldingFinishing | ITAR |
| Custom Machine Milling, Turning, Welding, Grinding | Hagerstown, MD | MillingTurningWeldingGrinding | - |
| Lake Precision Machine Inc Turning, Welding | Hagerstown, MD | TurningWelding | - |
| NRL & Associates Inc Milling, Turning, Bending, Welding, Assembly | Stevensville, MD | MillingTurningBendingWeldingAssembly | - |
| Paradorn, LLC Milling, Turning · ITAR | White Plains, MD | MillingTurning | ITAR |
| Ray Machine Inc Milling, Turning, Laser, Bending, Welding, Finishing · ISO 9001, AS9100 | Middle River, MD | MillingTurningLaserBendingWeldingFinishing | ISO 9001, AS9100 |
| Tec Inc Milling, Turning, Swiss, Laser, Punching, Bending, Welding, Finishing, Assembly · ISO 9001 | Frederick, MD | MillingTurningSwissLaserPunchingBendingWeldingFinishingAssembly | ISO 9001 |
| Tidewater Machine Co Milling, Turning, EDM | White Plains, MD | MillingTurningEDM | - |
| Vulcan Engineering & Manf Milling, Turning, Laser, Punching, Bending, Welding, Grinding, Finishing | Waldorf, MD | MillingTurningLaserPunchingBendingWeldingGrindingFinishing | - |