Lithium Americas is a North American resource and materials company focused on developing, building, and operating lithium deposits and chemical processing facilities. The company's flagship asset, Thacker Pass, is located in Humboldt County in northern Nevada and is the world's largest known measured lithium source and reserve. We are focused on safely and responsibly developing Thacker Pass to production to help strengthen national security and enable cleaner energy sources. We are committed to minimizing environmental impact, creating family-supporting jobs, and maximizing sustainable value for our stakeholders. Safety Supervisor Company Overview Lithium Americas is a North American resource and materials company focused on developing, building and operating lithium deposits and chemical processing facilities. The company's flagship asset, Thacker Pass, is located in Humboldt County in northern Nevada and is the world's largest known measured lithium source and reserve. We are focused on safely and responsibly developing Thacker Pass to production to help strengthen national security and enable cleaner energy sources. We are committed to minimizing environmental impact, creating family-supporting jobs and maximizing sustainable value for our stakeholders. Lithium Americas is headquartered in Vancouver, British Columbia and operates in the U.S., with offices in Reno, NV and Winnemucca, NV. The Company's shares are listed on the Toronto Stock Exchange (TSX) and New York Stock Exchange (NYSE) under the symbol LAC. Our Purpose, Vision and Values Our purpose, vision and values are the guiding principles that will serve as the cornerstone of our company's future direction and operations, aligning our team and organization towards our common goals. Our Purpose is to safely and sustainably produce lithium from Thacker Pass to enable North America to reduce dependence on foreign critical minerals and drive value for our stakeholders. Our Vision is to be North America's leading lithium producer to enable cleaner energy sources. Our Values include Act with Integrity, Be Responsible and Act with Care, Commit to Excellence and Drive Innovation, and Be a Collaborative Partner. Role We are seeking a Safety Supervisor to join our Health and Safety Team. In this role, you will serve as the on-site safety leader for day-to-day Health and Safety (H&S) operations at Thacker Pass, working directly with frontline teams to ensure compliance, promote a strong safety culture, and drive continuous improvement. The Safety Supervisor will lead the implementation of safety programs, manage permit systems, oversee contractor safety compliance, and directly supervise Safety Specialists on site. The plant will consist of a sulfuric acid plant and processes for clay beneficiation, acid leaching, neutralization, crystallization, chemical precipitation, solid/liquid separations, and ion exchange. The successful candidate will have demonstrated supervisory experience, strong communication skills, and a proven ability to drive safety performance in OSHA and MSHA regulated environments. The role is based at the Thacker Pass site and reports to the Safety Manager. Occasional travel to other LAC offices, project sites, or vendor locations may be required. Key Responsibilities Serve as the primary on-site safety point of contact for Thacker Pass day-to-day operations, providing direct oversight and visible safety leadership across all work areas. Supervise Safety Specialists, providing guidance, task delegation, performance feedback, and professional development support. Partner with the Safety Manager to implement site-level safety programs, ensuring alignment with LAC-wide standards and regulatory requirements. Represent the Safety Manager on site in their absence, serving as the acting safety authority for operational decisions. Collaborate with operations supervisors, contractors, and department leads to proactively identify and mitigate hazards before work begins. Chair or facilitate daily and weekly safety meetings, toolbox talks, and pre-task planning sessions with frontline teams. Ensure day-to-day site compliance with MSHA and OSHA requirements; coordinate with the Safety Manager on regulatory strategy and agency interactions. Manage the site Safe Work Permit system, including Confined Space Entry, Lockout/Tagout, Hot Work, and Excavation permits, ensuring proper issuance, execution, and closure. Conduct regular safety walk-throughs, inspections, and audits of facilities, equipment, and emergency systems; document findings and drive timely corrective actions to closure. Support the Safety Manager in maintaining required safety compliance documentation, records, and regulatory submissions. Coordinate with operations teams to ensure compliance with the OSHA Process Safety Management (PSM) program requirements applicable to site activities. Develop, schedule, and deliver

MSHA/OSHA

required training for employees, contractors, and visitors; maintain complete and accurate training records and verification. Coordinate and oversee onboarding safety orientation for new employees, contractors, and site visitors. Conduct hazard assessments for new chemicals, processes, and tasks introduced to the site. Support the site industrial hygiene program, including coordination of occupational exposure monitoring activities. Oversee PPE and lockout/tagout equipment programs, ensuring availability, proper maintenance, and correct usage across all crews. Lead the timely investigation of incidents and near-misses, identifying root causes and implementing corrective and preventive actions with documented closure. Maintain and report on safety performance metrics and leading indicators; escalate trends and concerns to the Safety Manager. Actively participate in the site Safety Committee and support broader safety culture initiatives. Drive continuous improvement projects to enhance safety performance and reduce risk exposure at Thacker Pass. Participate in internal audit programs and support the development and tracking of corrective action plans. Support the development and maintenance of the Site Emergency Response Plan under the direction of the Safety Manager. Participate in and help the Emergency Response Coordinator with any Emergency Response training, drills, and readiness activities on site. Serve as an on-site emergency coordinator during incidents, escalating to the Safety Manager and site leadership as appropriate. Build and maintain trusted relationships across all teams while championing a culture that reflects and supports our Purpose, Vision, and Values Perform other duties as assigned Required Qualifications Bachelor's degree in Occupational Health & Safety, science, or a technical discipline related to health and safety, or equivalent relevant work experience. Minimum 5 years of progressive safety experience in the chemical, mining, mineral processing, or oil and gas industry, including at least 2 years in a supervisory or lead safety role. Working knowledge of U.S. and Nevada OSHA and/or MSHA regulations; experience in an OSHA Process Safety Management (PSM) facility is strongly preferred. Demonstrated ability to supervise and develop safety personnel and work effectively with frontline operations teams. Strong written and verbal communication skills with the ability to deliver effective safety training and engage diverse audiences. Proficiency in Microsoft Office Suite and safety management software. Emergency Medical Technician (EMT) certification or State First Responders' certification is a plus. Certified Mine Safety Professional (CMSP), Certified Safety Professional (CSP), or working toward certification is a plus. Personal commitment to Lithium Americas' Purpose, Vision, and Values Working at Lithium Americas At Lithium Americas, we believe our people are our most valuable asset. We offer a collaborative and inclusive work environment, with opportunities for long-term growth and skills development. We are committed to building a diverse and respectful workplace and strongly encourage applications from individuals of all backgrounds. Equal Opportunity Statement Lithium Americas is an Equal Opportunity Employer. We do not discriminate based on race, gender, disability, age, veteran status, religion, sexual orientation, or any other protected status. All qualified applicants will receive consideration for employment. Lithium Americas is a North American resource and materials company focused on developing, building, and operating lithium deposits and chemical processing facilities. The company's flagship asset, Thacker Pass, is located in Humboldt County in northern Nevada and is the world's largest known measured lithium source and reserve. We are focused on safely and responsibly developing Thacker Pass to production to help strengthen national security and enable cleaner energy sources. We are committed to minimizing environmental impact, creating family-supporting jobs, and maximizing sustainable value for our stakeholders.