Human Resources Manager

MP Materials • Mountain Pass, CA

2d • $120,000 - $135,000 • Onsite

About The Position

The Human Resources Manager shapes and executes the human capital strategy in support of business objectives at the Mountain Pass, California location. The role oversees HR functions including talent acquisition, employee relations, performance management, and labor-law compliance across all sites. Working closely with senior leadership, the Manager aligns HR initiatives with organizational goals and improves workforce effectiveness while helping attract, develop, and retain talent and maintain a compliant, supportive workplace culture.

The position also involves coaching and developing leaders and facilitating leadership development sessions. Work is conducted in an open-pit mine or manufacturing/chemical plant setting, potentially at an elevation of 4,700 feet and with exposure to changing outdoor weather and industrial hazards. Personal protective equipment is required in mine, manufacturing, outdoor, or plant environments.

Requirements

• Bachelor’s degree in Human Resources, Business Administration, or a related field.
• At least 5 years of progressive experience in human resources management or a similar role.
• Strong knowledge of U.S. labor laws and HR best practices.
• Excellent communication and interpersonal skills, with the ability to build relationships at all organizational levels.
• Experience managing employee relations, recruitment, and performance management processes.
• Experience with HRIS systems and data analytics tools, such as ADP.
• Must pass a full-face respiratory fit test.
• Must be able to lift 50 lbs and work in PPE level C.

Nice To Haves

• Experience with California employment law.
• Professional HR certification such as SHRM-CP or PHR/SPHR.
• Experience working in a multi-state environment with diverse workforce populations.
• Demonstrated success leading diversity, equity, and inclusion initiatives.

Responsibilities

• Lead and manage human resources activities, including recruitment, onboarding, training, performance evaluation, and employee development.
• Coach and develop leaders and facilitate leadership development sessions.
• Develop, implement, and update HR policies and procedures to ensure compliance with federal, state, and local employment laws and regulations.
• Advise management and employees on HR matters, including conflict resolution, disciplinary actions, and workforce planning.
• Drive employee engagement initiatives and diversity, equity, and inclusion programs.
• Analyze HR metrics and prepare reports to inform leadership decisions and identify opportunities for organizational improvement.
• Oversee employee relations and ensure timely, effective resolution of workplace issues and grievances.
• Coordinate with external vendors and legal counsel as needed to support HR operations and compliance.
• Follow company, industry, and regulatory safety procedures and laws; promote workforce safety and participate in Process Hazard Analysis procedures and Pre-Startup Safety Reviews.

What This Job Offers

• Job Type: Full-time
• Career Level: Manager