Warehouse Supervisor - Receiving

Warehouse Supervisor - Receiving Full Time Mountain Pass, CA, US Salary Range: $90,000.00 To $110,000.00 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 Warehouse Supervisor – Receiving is responsible for providing full ownership of receiving operations at Mountain Pass, ensuring materials are received accurately, on time, and in compliance with company standards. Reporting into the Supply Chain structure, this role supervises crews to maintain strict process discipline, drive inventory accuracy, and eliminate ambiguity in receiving activities. The supervisor establishes clear operational ownership to support scalable, incident-free 24/7 warehouse operations. Position Responsibilities Deliver accurate SAP / ERP system transactions to maintain inventory integrity. Enforce a same-day receiving standard to eliminate material backlogs and ensure processing occurs within defined timeframes. Maintain full alignment with Sarbanes‑Oxley (SOX) compliance, safety mandates, and environmental expectations to deliver incident‑free operation Perform precise validation checks comparing Purchase Orders (PO) vs. Bills of Lading (BOL) vs. physical material. Coordinate and communicate with Accounts Payable (AP) to ensure tight Goods Receipt (GR) vs. invoice validation. Ensure all inbound materials are labeled immediately upon receipt with the PO number, material number, quantity, and date. Execute and verify team shift readiness, focusing on required PPE usage and punctuality. Support site inventory control activities, including cycle counts, variance investigations, and authorized stock adjustments. Ensure all material or paperwork discrepancies are identified immediately at the point of receipt. Enforce comprehensive documentation of variances using photos, detailed BOL notes, and system flags. Maintain and manage a discrepancy tracking log from initial detection to final closure, coordinating resolutions seamlessly with Procurement. Support incoming deliveries schedule to optimize material flow and layout systems. Escalate and manage damaged or compromised materials alongside any spills or environmental incidents. Execute mandatory weekly area walkthroughs with documented photo evidence and ensure full compliance with housekeeping checklists and standardized scorecards. Serve as the subject matter expert for warehouse activities and requirements, and other duties as assigned. Lead daily receiving activities and monitor workloads ensure the success of the crew. Act as a supportive and inspirational leader who can work independently with a high sense of urgency in a hands‑on, active industrial yard team environment. Required Experience Bachelor’s degree in business, logistics, supply chain, or related field. Or 5 years of progressive experience in warehouse operations in an industrial environment. Proven ability to lead teams, manage shift schedules, assess individual capabilities, and enforce strict team discipline and execution. Minimum 3 years of experience supervising/managing warehouse operations. Strong experience with ERP and MRP systems. SAP is a plus. Direct experience operating in a mining, refining, chemical processing, or construction environment preferred. Solid working knowledge of industrial environmental health and safety standards, safety data sheet (SDS) compliance, and OSHA/DOT guidelines applying to hazardous materials handling and storage. Advanced computer skills including Microsoft Office. Ability to operate forklifts and obtain required operating certifications if needed. 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. 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. 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 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. #J-18808-Ljbffr MP Materials Corp.