Machinist, Tool & Die

MP Materials 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 Tool & Die Machinist manufactures, repairs, and improves precision tools, dies, jigs/fixtures, and custom components that support magnet manufacturing and pilot/process engineering. This role focuses on turning shafts, holding tight tolerances, and finishing critical features on new and existing tooling and equipment. You will collaborate with Process Engineers and Design Engineers to interpret drawings and GD&T, prototype variations of parts and tooling, and provide manufacturability feedback to accelerate. Position Responsibilities 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/ID) 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. Basic Qualifications 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/ID) 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. MP Materials is Proud to be an Equal Opportunity / Affumative 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. #J-18808-Ljbffr MP Materials Corp.