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Senior Accounts Payable Specialist

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 Senior AP Specialist is responsible for supporting Accounting to maintain the integrity of the Accounts Payable function and to ensure all vendors are paid correctly and on a timely basis. The Senior AP Specialist will support the administrative office in Las Vegas, Nevada, and the mining and chemical processing facilities in Mountain Pass, California. While the position will be based in Las Vegas, Nevada, there will be occasional travel to the Mountain Pass, California site.

Position Responsibilities:

Code invoices, vouchers, expense reports, check requests, etc., with correct codes.
Serve as escalation point for complex, high-value, or non-standard AP transactions.
Exercise independent judgment in resolving invoice discrepancies in accordance with company policy.
Conform coding to standard procedures to ensure proper entry into the financial system.
Manage complex vendor inquiries and disputes, including statement reconciliations and issue resolutions for key vendors.
Investigate and resolve problems associated with processing of invoices and purchase orders.
Prepare batch check runs, wire transfers, and ACH transactions.
Support month-end close activities including accrual preparation, reconciliations, and reporting.
Reconcile various accounts by identifying errors in posting or omissions by applying appropriate accounting standards.
Process remittance information from checks, drafts and wire transfers for invoices provided by vendors.
Provide guidance to AP Specialists on invoice processing, credit memos, and system functionality.
Assist the Accounts Payable Manager in preparing and monitoring SOX Controls related to Accounts Payable.
Work with the IT department on creating efficiencies for our AP processes which includes identifying SAP functionality that needs to be incorporated into daily work processes.
Complete UAT for IT department related to SAP upgrades and new work processes.
Other duties as assigned.

Basic Qualifications:

Bachelor’s degree in Accounting, Finance, or Business Administration or equivalent (Preferred)
5+ years accounts payable or general accounting experience.

Desired Qualities:

Exceptional integrity and ethics are required to maintain confidential information.
Strong organizational skills with the ability to pay close attention to detail.
Sound judgement and the ability to make reasonable decisions in the absence of direction.
Efficient time management skills and the ability to complete tasks by deadline.
Ability to effectively prioritize multiple projects.
Must be able to work as part of a team and independently.
Ability to enter data with consistent accuracy.
Able to adapt and remain positive during changes to processes and working conditions.
Strong, professional communication skills in listening, speaking, and writing necessary for communication with all levels of employees.

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.

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.

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