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.

Position Overview:

MP Materials is seeking a hands-on Senior Engineer to lead the development of advanced technologies for producing high-purity rare earth metal and alloys, critical for high-performance permanent magnets. This role focuses on developing and scaling electrometallurgical and pyrometallurgical technologies – including but not limited to molten salt electrolysis and metallothermic reduction The ideal candidate will bring deep expertise in extractive metallurgy, and apply a combination of experimental research, process modeling, and material science expertise to design, optimize, and scale metal making pathways. This position will play a pivotal role in restoring strategic manufacturing capabilities to the U.S.

Position Responsibilities:

• Lead the development and optimization of rare earth metal and alloy production processes.
• Design and execute laboratory and pilot-scale experiments involving high-temperature reaction kinetics, molten salt systems, and reduction pathways.
• Apply simulation tools to model the thermodynamics, transport phenomena, and electrochemical behavior in rare earth metal extraction and refining.
• Translate lab and pilot-scale findings into scalable, production ready processes.
• Collaborate cross-functionally with R&D, manufacturing, and quality teams to align process development with operational goals.
• Characterize materials using techniques such as XRD, XRF, LECO, and SEM.
• Utilize electrochemical instrumentation (e.g., galvanostats, potentiostats) and techniques (e.g., cyclic voltammetry, impedance spectroscopy) to tune and evaluate processes.
• Document all projects, provide written guidance for model usage, and build team knowledge of current and future rare earth research.
• Work closely with EHS to ensure that all work is done to ensure world-class health and safety, and full compliance with relevant environmental regulations .
• Engage with university researchers, strategic partners, and government laboratories involved in rare earth reduction research to bring value and knowledge to MP Materials.
• Other duties as assigned,

Basic Qualifications: