Solvent Extraction Superintendent

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process. Mountain Pass, CA, US 5 days ago Requisition ID: 2115 Salary Range: $120,000.00 To $150,000.00 Annually 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 The Solvent Extraction (SX) Superintendent is responsible for the safe, reliable, and efficient operation of multiple rare earth separation facilities across site operations. This position provides leadership and direction to SX operations teams while driving operational excellence, process optimization, workforce development, and continuous improvement initiatives. The SX Superintendent works closely with all operations, maintenance, engineering, metallurgy, EHS, and project teams to ensure production targets, quality standards, and safety expectations are consistently achieved. This role is responsible for building strong frontline leadership, developing operating discipline, and ensuring sustainable performance across all SX areas. Position Responsibilities Lead and manage all day-to-day SX operations activities across multiple SX circuits and operating areas. Provide after-hours leadership support to ensure uninterrupted production and timely resolution of operational disruptions. Ensure prompt response to production escalations and coordination of resources to address production issues. Drive a strong safety culture through visible field leadership, operational discipline, hazard recognition, and compliance with all MSHA, Cal-OSHA, and company safety standards. Provide leadership and direction to supervisors, operators, and support personnel while promoting accountability and team development. Partner with maintenance and reliability teams to improve equipment uptime, reduce operational disruptions, and prioritize critical repairs. Collaborate with metallurgical and technical teams to optimize SX performance, improve recoveries, and reduce process variability. Monitor and analyze operational KPIs including throughput, recovery, reagent consumption, organic losses, downtime, and production efficiency. Support commissioning, startup, and ramp-up activities for new SX circuits and expansion projects. Ensure operating procedures, standards, and best practices are developed, maintained, and consistently followed. Support workforce development through coaching, mentoring, succession planning, and operational training initiatives. Drive continuous improvement efforts including 5S, operational excellence, process optimization, and cost reduction initiatives. Participate in budgeting, manpower planning, and operational resource allocation. Maintain strong field presence and engagement with frontline teams to reinforce expectations and operational priorities. Basic Qualifications Minimum of 7+ years of experience in solvent extraction operations, hydrometallurgical processing, chemical processing, or related industrial operations. Minimum of 5+ years of leadership experience in a supervisor or superintendent-level role. Strong working knowledge of solvent extraction principles, process control strategies, and hydrometallurgical operations. Demonstrated ability to lead through change, drive accountability, and develop high-performing teams. Strong troubleshooting and problem-solving skills related to process and operational performance. Proficiency with Microsoft Office Suite and operational reporting systems. Desired Qualities Bachelor’s degree in Chemical Engineering, Metallurgical Engineering, Chemistry, or related technical discipline. Experience in rare earth processing or similar hydrometallurgical operations. Experience supporting plant commissioning, startup, and expansion projects. Working knowledge of MSHA and Cal-OSHA regulations and safety management systems. Familiarity with continuous improvement methodologies and operational excellence systems. MP Materials is Proud to be an Equal Opportunity / Affidavit 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. For Assistance with Application Alternative methods of applying for employment are available to individuals unable to submit an application through this site because of a disability. Contact Human Resources Department at View phone number on click.appcast.io; dial 7 when prompted for HR;1700 South Pavilion Center Dr. 8th Floor, Las Vegas, NV 89135 to discuss reasonable accommodation. Safety Provision Employees are responsible for following all company, industry and regulatory procedures and laws to ensure a safe work environment for themselves and the company. Employees must have a willingness to promote safety among the workforce, participate in Process Hazard Analysis procedures and Pre-Startup Safety Reviews. (PPE) Personal Protective Equipment is required when performing work in a mine, manufacturing, outdoor, or plant environment. Required PPE may include, but is not limited to, hard hat, hearing protection, safety glasses, safety footwear, respirator, rubber steel-toe boots, protective clothing, gloves, and any other protective equipment as required. Working Conditions Our facility sits at an elevation of 4,700 feet. Employees may be subject to extreme weather conditions when working in an outdoor setting (heat and cold, wind). Work is at an open pit mine or manufacturing/chemical plant setting, which may include exposure to moving mechanical parts, toxic chemicals, risk of electrical shock, explosives, fumes, or airborne particles. Physical Demands Manual dexterity; sense of touch; sense of smell; speaking clearly; hearing-speech range; hearing – all ranges; seeing, reading and comprehension; seeing – distant/near; depth perception; color vision. While performing the job responsibilities, the employee is required to talk and hear. The employee is often required to stand and use their hands and fingers, to handle or feel and to manipulate laboratory equipment. The employee is occasionally required to walk, reach with arms and hands, climb or balance, and to stoop, kneel, crouch or crawl. Vision abilities required by this job include close vision. Employees must pass a full-face respiratory fit test. Employees must be able to lift 50 lbs. Must be able to work in PPE level C. These requirements are representative, but not all-inclusive, of the knowledge, skill, and ability required of the employee. #J-18808-Ljbffr MP Materials Corp.