Metallurgy Technician

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.

MP Materials is seeking a Metallurgy Technician to join our Process Technology and Engineering Department at Mountain Pass, CA. This role is ideal for someone with a background in mining, geology, mineral processing, or a deep interest in earth sciences who is eager to grow in a fast-paced R&D environment. The Metallurgy Technician will support mineral processing research and development projects, including flotation reagent testing, process chemistry trials, and lab-to-plant scale evaluations.

The results of this work will directly contribute to advancing mineral processing technology with real-world impact. While normally a day shift position, flexibility to work other shifts or overtime at short notice may be required.

• Collect and prepare samples from the mill and flotation circuits.
• Perform laboratory testing, including froth flotation and related mineral processing experiments.
• Operate laboratory and pilot-scale equipment such as crushers, grinders, filters, sieves, shakers, and flotation cells.
• Accurately record observations, test conditions, and results; assist with preliminary data analysis.
• Maintain and organize lab supplies, equipment, and test areas.
• Support process development initiatives, including evaluation of new flotation reagents, technologies, and process improvements.
• Communicate test results and observations clearly to engineers and other team members.
• Follow all safety protocols and actively identify potential hazards.
• Collaborate with cross-functional teams including Process Development, Mill Operations, Mining, Maintenance, and Analytical Services.
• Perform additional tasks as directed by management.

• Strong interest in mining, geology, mineral processing, or related earth sciences.
• 1+ year experience in a lab, mining, mineral processing, chemical, petroleum, or heavy industrial setting (preferred).
• Ability to follow technical instructions and keep accurate, legible records.
• Safety-oriented mindset and willingness to accept personal responsibility for safe work practices.
• Minimum High School Diploma/GED required.
• Valid Driver’s License and clean driving record (required to operate company vehicles on site).

• Prior experience in mineral processing, especially froth flotation (big plus).
• Experience in laboratory sample preparation, wet chemistry, or mineral processing tests.
• College-level coursework in chemistry, geology, mining, or materials engineering.
• Associate or bachelor’s degree in a related discipline preferred.
• Mechanical aptitude and ability to work with lab/pilot-scale equipment.
• Familiarity with analytical tools (e.g., XRF) and sample preparation techniques.

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…