Senior Human Resources Generalist

MP Materials Corp.; Las Vegas (NV); On-site; USD 90,000 - 120,000; Full time

Job summary

MP Materials Corp. in Las Vegas, NV is seeking a Senior Human Resources Generalist to provide expertise and support across HR functions from our Las Vegas corporate office.

You will drive the recruiting lifecycle, onboarding, benefits coordination, and HR program delivery while ensuring compliance with policies and regulations. The role partners with leadership to develop talent, improve processes, and mitigate risk, serving as a trusted advisor to employees and management in a fast-paced,

Qualifications

• Bachelor’s degree in Human Resources or relevant field.
• Minimum 4 years of HR experience, with at least 2 years in a generalist role.
• Proficiency using ADP or other HR systems.
• Strong written and verbal communication skills.
• Ability to interpret information and drive change.

Responsibilities

• Support HR areas with ad hoc projects and tasks across compensation, benefits, talent development and engagement.
• Assist onboarding, orientation, and exit interviews; ensure data integrity in HRIS.
• Prepare HR metrics, reports, and documentation for management, auditors, and stakeholders.
• Collaborate with cross‑functional teams on job descriptions, offers, and internal mobility.
• Develop and optimize HR processes; monitor timelines and resource needs to drive results.

Skills

HR generalist experience

ADP proficiency

Communication skills

Time management

HRIS and reporting tools

Cross-functional partnering

Education

Bachelor’s degree in Human Resources

Tools

ADP Workforce Now

Microsoft Excel

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.

Senior Human Resources Generalist

Full Time Professional Las Vegas, NV, US

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 Generalist, Human Resources provides expertise and support from our Las Vegas Corporate office across all areas within Human Resources, but most noticeably in being an ambassador for the organization. The role will play an integral part of the employee and candidate experience through the recruiting and human resources life cycle from sourcing, screening, scheduling, travel arrangements, data integrity, onboarding, benefits, HR virtual and on‑site experience(s).

The Senior Generalist, Human Resources will support in the strategic and operations HR expertise while ensuring compliance with corporate policies, federal, state and local regulations, and SOX requirements. This role serves as a trusted advisor to employees, helping drive HR programs that align with business objectives, enhance performance and mitigate organizational risk.

Position Responsibilities:

• Support the various HR areas with ad hoc projects and tasks, including operations, compensation and benefits, talent development and training, employee engagement, and other functions.
• Identify and drive continuous improvement initiatives by evaluating HR processes, systems and procedures, proposing solutions, and driving solutions to completion.
• Facilitate tasks for onboarding, new‑hire orientation, and exit interviews, including data entry in HRIS and audits for accuracy and compliance.
• Assist in preparing HR‑related metrics, reports, and documentation for management, auditors, and stakeholders.
• Assist with system integration and optimization efforts for HR, including task tracking, documenting, monitoring timelines, reviewing resource needs, and driving results to completion.
• Provide coaching and guidance on HR policies, procedures, and employment law.
• Provide guidance on goal setting, employee development, and career progression.
• Manage full‑cycle recruiting including strategic planning with the hiring teams, sourcing candidates, interviewing, screening, coordinating the selection and offer letter process, and supporting hiring requirements.
• Partner with business leaders to understand operations to define candidate talent requirements and sourcing approach.
• Partner with HR cross‑functional teams with creating job descriptions, preparing offers, handling internal mobility, and other activities within the recruiting cycle.
• Develop optimal processes to maintain accurate and up‑to‑date records of candidate information in the applicant tracking system.
• Other duties as assigned.

Basic Qualifications:

• Minimum 4 years of Human Resources with at least 2 years in a generalist or senior generalist role, preferably in a public company or regulated environment.
• Bachelor’s degree in Human Resources or relevant field of study.
• Proficiency using ADP and/or other HR systems and technology.
• Demonstrated ability to effectively partner with HR cross functional teams, business operations, and other stakeholders within the business.
• Demonstrated ability to interpret information, make suggestions, and drive change.
• Excellent written and verbal communication skills.
• Demonstrated time management skills, and ability to retain responsiveness in a vibrant, multi‑task environment.

Desired Qualities:

• Experience and/or strong knowledge of overall Recruiting/HR practices, such as compensation, benefits, talent management, DEI, and HR operations.
• Experience working directly with/for senior leadership positions.
• Proactive and solution‑oriented mindset.
• Ability to balance strategic thinking and hands‑on execution.
• Experience developing and/or maintaining relationships with external organizations.
• General project management skills and/or experience launching initiatives and programs.
• Strong proficiency in Microsoft Office suite, including but not limited to Excel, HRIS, and HR reporting tools.
• Ability to maintain strict confidentiality and exercise sound judgment.

MP Materials is Proud to be an Equal Opportunity / Aff…

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.