Maintenance Supervisor

MP Materials Corp.•Mountain Pass, CA

1h•$110,000 - $120,000•Onsite

About The Position

MP Materials 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.

Requirements

7+ years of industrial mechanical experience (rotating equipment, machining, welding, fabrication, or hydraulics/pneumatics).
2+ years leadership or senior-level mechanical maintenance experience.
Strong mechanical troubleshooting capability across production and facility systems.
Ability to interpret mechanical drawings, fabrication prints, piping isometrics.
CMMS experience (SAP preferred).
Strong communication and cross-functional collaboration skills.

Nice To Haves

Safety-driven craftsmanship.
Hands-on leadership style.
High mechanical aptitude.
Strong communicator and collaborator.
Commitment to continuous improvement.
Detail-oriented and technically disciplined.

Responsibilities

Lead mechanical maintenance activities, including troubleshooting, equipment repairs, fabrication, machining, and rebuilds.
Establish technical standards and workmanship expectations for mechanical, fabrication, and machining job types.
Develop, implement, and improve PM programs for rotating equipment, hydraulic/pneumatic systems, fabrication tools, and mechanical assets.
Oversee alignment procedures, bearing fits, lubrication practices, welding quality, machining tolerances, and piping/fabrication accuracy.
Ensure accurate and detailed SAP documentation including PM updates, corrective work, labor confirmations, and parts usage.
Collaborate with Engineering, Operations, Reliability, and Projects to address chronic mechanical issues and support equipment installations.
Support rigging, alignment, commissioning, and mechanical integration for new equipment.
Participate in RCAs and reliability improvement initiatives.
Maintain strict adherence to LOTO, hot work, rigging safety, confined space, and machine guarding requirements.
Coach, mentor, and build technical talent across mechanics, welders, and machinists.