| Oscar's Custom Iron Works Welding | San Antonio, TX | Welding | - |
| Pulsar Machining LLC Milling, Turning, Laser, Finishing · ISO 9001, ITAR | Rosenberg, TX | MillingTurningLaserFinishing | ISO 9001, ITAR |
| R-O Mfg. Co Laser, Punching, Bending, Welding, Assembly · ISO 9001, ITAR | Fort Worth, TX | LaserPunchingBendingWeldingAssembly | ISO 9001, ITAR |
| Resivine LLC Milling, Turning, Waterjet, EDM, Grinding | Houston, TX | MillingTurningWaterjetEDMGrinding | - |
| Scientific Machine & Welding, Inc. Welding | Austin, TX | Welding | - |
| Seal Tex Welding | Dallas, TX | Welding | - |
| SF Industries USA Laser, Bending, Welding | Brenham, TX | LaserBendingWelding | - |
| SLT Machine Works LLC Milling, Turning · ISO 9001, AS9100 | Stafford, TX | MillingTurning | ISO 9001, AS9100 |
| SMS Precision Tech, LLC Waterjet, Welding, EDM · ISO 9001 | Tomball, TX | WaterjetWeldingEDM | ISO 9001 |
| South Austin Metals Bending, Welding | Austin, TX | BendingWelding | - |
| Steel Specialties Inc. Welding | El Paso, TX | Welding | - |
| Steeltron Metal Works Bending, Welding | San Antonio, TX | BendingWelding | - |
| Strickland Industries Milling, Turning, Laser, Bending, Welding, Assembly | Mansfield, TX | MillingTurningLaserBendingWeldingAssembly | - |
| Texas Metal Specialty Co Laser, Welding, Waterjet | Houston, TX | LaserWeldingWaterjet | - |
| Texas Specialty Steel Welding | San Antonio, TX | Welding | - |
| Texoma Industries of Graham, LLC Milling, Turning, Bending, Welding | Graham, TX | MillingTurningBendingWelding | - |
| Thompson-Mathis Metal Mfg. Bending, Welding | Dallas, TX | BendingWelding | - |
| Tico Tooling LLC Milling, Turning, Stamping, EDM, Grinding · ISO 9001 | San Marcos, TX | MillingTurningStampingEDMGrinding | ISO 9001 |
| United Machining Services Inc Welding · ISO 9001, AS9100 | Conroe, TX | Welding | ISO 9001, AS9100 |