Manager, Inventory & Cost Accounting

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 (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.

The Manager, Inventory & Cost Accounting, is a member of the Company's corporate operational accounting team and supports cost accounting, inventory valuation, and production reporting processes, with a primary focus on the Company's Texas magnetics facility and related magnetics costing operations. This role partners with facility operations and corporate accounting, costing, and finance teams to support consistent application of policies, procedures, controls, and reporting standards.

The Manager, Inventory & Cost Accounting, will work closely with the corporate accounting team, primarily the operational accounting team, operations, IT, the Plant Controller, and FP&A to support production reporting, standard costing, variance analysis, month-end close, and continuous improvement initiatives. This role will also help develop, implement, and maintain systems, procedures, and policies for inventory and costing as the Company expands its manufacturing operations.

Specific focus and attention will be on the Texas magnetics facility’s control environment, including the identification, capture, review and analysis of material and labor costs. The role currently has no direct reports but may support future organization growth at the magnetics facility as operations expand.

• Review daily and weekly cost of sales and production reports to ensure completeness and accuracy within SAP.
• Review and update cost standards for material and labor price changes.
• Review inventory accounts and inventory activity roll forwards.
• Evaluate monthly activity rates and standard costing calculations to verify the accuracy of month-end close reporting.
• Monitor variance accounts for accuracy, research discrepancies from standards, and determine required changes including purchase price variances and other cost-related variances.
• Review and approve magnetics-related monthly journal entries prepared by Cost and Inventory Accountants in the corporate office.
• Complete monthly analysis of under- and over-