Fabricator​/Welder

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.

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 pipe fitting skills, and a relentless commitment to safety and craftsmanship.

• Set up and operate manual and CNC lathes to turn shafts, journals, and threaded features, control runout, concentricity, and surface finish to spec.
• Mill, drill, bore, and tap components on manual/CNC mills; perform precision layout and hole patterns.
• Perform surface and cylindrical grinding (OD/) and honing to achieve tight tolerances and finishes on critical features.
• Build, repair, and optimize tools, dies, jigs, fixtures, gauges, and special tooling for production and R&D/pilot operations.
• Read and interpret engineering drawings, GD&T callouts, isometrics, and 3D models; verify dimensions/tolerances before and during machining.
• Program, set up, and prove out CNC jobs (conversational or CAM); select tooling, speeds/feeds, work holding, and offsets to meet quality and takt.
• Inspect in process and final parts using micrometers, bore gauges, indicators, height gauges, pins, optical comparator, and (as available) CMM.
• Hold tight tolerances as required (e.g., shaft/bore fits down to ±0.0005 in; critical features to ±0.0002 in) and document results.
• Deburr and finish parts to meet surface roughness and edge break requirements.
• Assemble, fit, and try out tooling; diagnose and correct issues (alignment, clearance, spring/stripper force, galling, wear).
• Collaborate with Engineering on prototypes and engineering changes; redline prints and suggest design‑for‑manufacture/assembly (DFM/DFA) improvements.
• Manage toolroom organization (5S), maintain machines and tooling, and track spares/consumables; coordinate heat treat and coating services when needed.
• Record time, parts, and work details in SAP CMMS; maintain traceability/documentation as required.
• Follow all safety procedures including machine guarding, LOTO, hot work, ventilation, and PPE; actively contribute to hazard identification and JHAs.

• 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 pipe fitting 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…