Supervisor, Operations

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.

As an Operations Supervisor at our Mountain Pass site, you will serve as a frontline leader, driving safe, efficient, and disciplined daily plant operations. You’ll lead by example, championing safety, maximizing performance, and instilling a culture of accountability, ownership, and pride. This role demands strong leadership in both field and control room settings, sound decision-making under pressure, and the ability to foster a team-oriented culture where safe, consistent, and high-quality results are the standard.

• Lead and support a team through daily operations in mineral processing and chemical productions.
• Frontline leadership, in the field, with your team.
• Ensure execution of daily plans is safe, efficient, and aligned with production goals.
• Drive a strong, team-first culture grounded in accountability, communication, and performance.
• Solve problems in real time, monitor production data, troubleshoot issues, and elevate appropriately.
• Set clear expectations, hold the line, and train team members to develop technical and leadership skills.
• Collaborate with cross-functional teams & leads and communicate clearly up and down the chain.
• Ensure compliance with safety procedures, environmental protocols, and HR policy.
• Handle other operational tasks as assigned by leadership.

• A proven leader with at least 3 years of experience in chemical, mining, or heavy industrial operations.
• Deep working knowledge of processing systems, equipment, and safety-critical operations.
• Comfortable with fieldwork and process oversight—from control rooms to pump pads.
• Able to build trust, give direct feedback, and uphold standards without micromanaging.
• Safety-focused, integrity-driven, and mission-aligned.
• Familiar with SCADA, PLC/HMI systems, Process Data Visualization and Historian Interfaces.
• Familiar with mechanical systems: kilns, dryers, thickeners, filter presses, pumps, valves, reactor tanks, wet scrubbers, heat exchangers.
• Valid driver's license and clean record (required to operate company vehicles).

• Able to read and apply PFDs and P&IDs for process oversight.
• Chemical Processing (Experience in solvent extraction, hydrometallurgy, chlor-alkali, ion exchange, and wet chemistry operations).
• Must be proficient in Microsoft Office (Word, Excel and Outlook).
• Experience with ERP and payroll/HR systems preferred.
• Excellent written and verbal skills required.

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.

In compliance with federal law, all persons hired will be required to verify identity and…