Rig Welder Jobs in Decatur, TX (NOW HIRING)

Company Overview:

MP Materials (NYSE: MP) is rebuilding American industrial capability for a new era of autonomy, robotics, and electrification.

We are the only U.S. company with a fully integrated rare earth supply chain—from mining and refining to advanced metal and magnet manufacturing. Our products include both the critical materials used to make permanent magnets and the finished magnets themselves—enabling next-generation technologies in robotics, automation, aerospace, transportation, defense, and energy systems. These materials are the foundation of physical AI—the convergence of computation, movement, and control.

We hire ambitious, mission-driven people who want to tackle complex challenges and shape the future of strategic industries. Our culture is rooted in teamwork, resiliency, and integrity, with a deep commitment to operational excellence and national purpose. MP is rapidly evolving from a materials producer into a leading U.S. manufacturer—and our people are driving that transformation.

Position Overview:

The Fabricator/Welder builds, fits, and installs structural fabrications, equipment frames, guards, platforms, and process piping that support magnet manufacturing operations. This role partners closely with Engineering to interpret drawings, prototype new designs, and deliver high-quality, reliable fabrications on schedule. Success in this role requires expert layout and fit-up, proficiency in multiple welding processes (GTAW/TIG, GMAW/MIG, SMAW; FCAW a plus), strong pipefitting skills, and a relentless commitment to safety and craftsmanship.

Position Responsibilities:

• Fabricate structural components (skids, frames, mezzanines, platforms, handrails, machine guards) from plate, tube, angle, and channel.
• Perform pipefitting and welding on carbon and stainless-steel process lines (butt weld, socket weld, threaded); cut, bevel, prep, fit, and support piping to spec.
• Read and interpret fabrication drawings, weld symbols, isometrics, and P verify dimensions and tolerances before and during build.
• Execute welding using GTAW/TIG, GMAW/MIG, and SMAW across all positions; select consumables, set parameters, and control heat input to meet quality requirements.
• Conduct layout and fit-up using jigs/fixtures, squares, precision levels, lasers, and measuring tools to achieve precise alignment.
• Cut and form material using oxy-fuel and plasma cutting, band saws, ironworker, press brake, shear, rollers, notchers, and grinders.
• Perform in-process and final quality checks (visual inspection, dimensional verification); coordinate NDE as required; complete rework to standard.
• Collaborate with Engineering on prototyping and new builds; provide manufacturability feedback, redline drawings, and suggest design improvements.
• Rig, move, and install fabrications safely; operate forklifts and overhead cranes; follow proper rigging and signaling practices.
• Maintain welding/fabrication equipment; perform basic troubleshooting and preventative maintenance on shop tools.
• Complete documentation: redlines, weld maps, material heat/lot traceability (when required), and work order updates; record time and materials in SAP CMMS.
• Follow all safety policies including LOTO, hot work permitting, ventilation, confined space protocols, and PPE; actively participate in 5S and housekeeping.
• Support planned outages, turnarounds, and urgent repairs; respond to priority work requests to minimize downtime.

Basic Qualifications:

• High school diploma or equivalent, 4+ years of industrial fabrication/welding experience in a manufacturing, maintenance, or shop environment.
• Proficiency in GTAW/TIG (stainless and carbon) and GMAW/MIG; SMAW required; FCAW experience is a plus.
• Strong blueprint reading skills including weld symbols; ability to work from isometric drawings and basic P&IDs.
• Demonstrated pipefitting ability (takeoffs from isos, offsets, fit-up, and support installation) to meet quality/tolerance requirements.
• Competent with layout math and precision measurement tools (tape, calipers, squares, angle finders, levels, lasers).
• Safe operation of forklifts, overhead cranes, and common fabrication tools; ability to obtain/maintain certifications.
• AWS D1.1 (structural steel) and/or AWS D1.6 (stainless) certifications; ASME Section IX qualifications for pipe a plus.
• Experience with sanitary tubing/orbital TIG, vacuum or high-purity gas systems, or cryogenic piping components.
• Experience building jigs and fixtures; basic machining (sawing, light mill/lathe ops) for fit-up.
• Familiarity with GD ability to interpret tolerance stacks in drawings.
• Experience collaborating directly with engineers/designers; comfortable giving manufacturability feedback and executing redlines.
• Prior use of CMMS (SAP preferred) for work orders, time, and parts tracking; ability to read bills of material (BOMs).

MP Materials is Proud to be an Equal Opportunity / Affirmative Action Employer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law. Underrepresented groups/Women/Disabled/Veterans are encouraged to apply. Candidates whose disabilities make them unable to meet the position’s requirements will still be considered qualified if they can perform the essential functions of the job with reasonable accommodation.

Your Right to Work – In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment verification document form upon hire.

For Assistance with Application - Alternative methods of applying for employment are available to individuals unable to submit an application through this site because of a disability. Contact Human Resources Department at 702-844-6111; dial 7 when prompted for HR; 1700 South Pavilion Center Dr. 8th Floor, Las Vegas, NV 89135 to discuss reasonable accommodation.