Operations Trainer (Solvent Extraction)

MP Materials Corp.; California (MO); On-site; USD 100,000 - 125,000; Full time

Job summary

MP Materials Corp. is seeking an Operations Trainer for Solvent Extraction in California. This role involves developing comprehensive training programs and ensuring that SX operations personnel are well-versed in solvent extraction processes. Applicants should have at least 4 years of experience in solvent extraction, a strong understanding of regulatory requirements, and proficiency with training platforms. MP Materials is committed to operational excellence, and the trainer will work closely with various teams to align training with production goals.

Qualifications

• Minimum of 4+ years of experience in solvent extraction operations or a related technical field.
• Strong working knowledge of solvent extraction principles.
• Experience with Learning Management Systems (LMS) and digital training platforms.

Responsibilities

• Develop and maintain standardized training programs for SX unit operations.
• Create and manage operator Line of Progression frameworks within the LMS.
• Deliver training on SX chemistry and process control philosophies.

Skills

Solvent extraction operations

Training and mentoring

Microsoft Office Suite proficiency

Education

Bachelor’s degree in Chemical Engineering, Metallurgical Engineering, or Chemistry

Tools

Learning Management Systems (LMS)

PFDs and P&IDs interpretation

Job description

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.

Operations Trainer (Solvent Extraction)

Mountain Pass, CA, US

3 days ago Requisition ID: 2049

Salary Range: $100,000.00 To $125,000.00 Annually

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) Operations Trainer is responsible for developing and delivering comprehensive, process-driven training programs for SX operations personnel. This includes establishing standardized training curricula, validating operator competency, and supporting commissioning and optimization of SX circuits.

This role serves as a subject matter expert (SME) in solvent extraction processes, ensuring that operators demonstrate proficiency in process fundamentals, control strategies, troubleshooting, and safe operating practices. The trainer works cross-functionally with operations, maintenance, engineering, and metallurgical teams to align training with plant performance objectives and continuous improvement initiatives.

Position Responsibilities

• Develop, implement, and maintain standardized training programs specific to solvent extraction unit operations, including extraction, scrubbing, stripping, and organic handling systems.
• Create and manage detailed operator Line of Progression (LOP) frameworks, including competency assessments, qualification standards, and progression criteria within the Learning Management System (LMS).
• Review, and audit Standard Operating Procedures (SOPs), ensuring technical accuracy, consistency, and alignment with current plant conditions and best practices.
• Deliver both classroom and field-based training covering SX chemistry, phase separation dynamics, reagent management, and process control philosophies.
• Interpret and train personnel on Process Flow Diagrams (PFDs) and Piping & Instrumentation Diagrams (P&IDs) specific to SX circuits.
• Support commissioning activities, including operator readiness, procedure validation, and training for new or modified systems.
• Conduct internal process audits and training effectiveness evaluations; provide data-driven recommendations for improvement.
• Lead or support root cause analysis and troubleshooting efforts related to SX performance issues, including phase disengagement, crud formation, and organic losses.
• Develop and maintain training matrices to ensure workforce competency across all SX process areas.
• Collaborate with site leadership, superintendents, and technical teams to ensure training aligns with production targets, safety standards, and operational priorities.
• Ensure compliance with MSHA, Cal-OSHA, and internal safety standards through structured training and verification.
• Support continuous improvement initiatives, including 5S, process optimization, and operational excellence programs.
• Participate in document control, policy deployment, and digital training platform management (e.g., LMS, Convergence Training).
• Promote a strong safety culture, including participation in Process Hazard Analyses (PHA), Pre-Startup Safety Reviews (PSSR), and near‑miss reporting.

Basic Qualifications

• Minimum of 4+ years of experience in solvent extraction operations, hydrometallurgical processing, or a related technical field.
• Demonstrated experience in training, mentoring, or technical leadership within a processing or chemical plant environment.
• Strong working knowledge of solvent extraction principles, including mass transfer, phase equilibrium, and reagent chemistry.
• Proficiency in interpreting and utilizing PFDs and P&IDs.
• Working knowledge of regulatory requirements, including MSHA and Cal OSHA standards.
• Experience with Learning Management Systems (LMS) and digital training platforms.
• Advanced proficiency in Microsoft Office Suite (Word, Excel, PowerPoint, SharePoint).

Desired Qualities

• Bachelor’s degree in Chemical Engineering, Metallurgical Engineering, Chemistry, or related discipline.
• Experience in rare earth processing or similar hydrometallurgical operations.
• Prior involvement in plant commissioning or major process start‑ups.

MP Materials is Proud to be an Equal Opportunity / ...

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 702‑844‑6111; 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.

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 comprehensions; 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.