Senior Internal Auditor

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.

The Senior Internal Auditor supports the execution of MP’s risk-based internal audit plan, including SOX compliance activities, operational audits, advisory projects, and other internal audit initiatives. This role will partner with stakeholders across the organization to evaluate risks, assess the effectiveness of internal controls, identify process improvement opportunities, and promote a strong control environment.

The Senior Internal Auditor will work collaboratively with management, external auditors, and cross-functional teams to provide practical recommendations that enhance operational effectiveness, strengthen controls, and support MP’s strategic objectives.

• Perform operational and SOX audits in accordance with professional standards, including planning, risk assessment, control evaluation, testing, issue identification, action plan development, and reporting.
• Evaluate business processes and internal controls to identify risks, inefficiencies, control gaps, and opportunities for improvement.
• Utilize data analytics and audit technology to identify trends, anomalies, exceptions, and potential risk indicators.
• Identify, document, and communicate audit observations and practical recommendations to management.
• Monitor remediation efforts and track management action plans through completion.
• Work closely with external auditors to support the annual SOX compliance process and promote audit efficiencies.
• Participate in reviews of new systems, business processes, and organizational initiatives to evaluate risks and control implications.
• Build effective relationships across the organization and collaborate with stakeholders to drive timely completion of audit objectives.
• Assist in the preparation of audit reports, presentations, and other materials for senior management and the Audit Committee.
• Perform special projects, investigations, and other internal audit-related responsibilities as requested.

• Bachelor’s degree in Accounting or related field.
• 3-5 years of relevant experience in internal audit, external audit, risk advisory, or a related discipline.
• Experience with SOX compliance, internal controls, and operational auditing.
• Strong communication, analytical, and problem-solving skills.
• Proficiency in Microsoft Excel, including data analysis using Pivot Tables, lookup functions, and other analytical tools.
• Ability to manage multiple priorities, work independently, and collaborate effectively in a fast-paced environment.
• Ability to build effective working relationships with stakeholders at all levels of the organization.
• Willingness to travel periodically to company locations, as needed.

• Experience in a Big 4 or other…