Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies. Backed by Khosla and a16z.
About the role
Lead, supervise, and develop a team of maintenance technicians while maintaining a safety-first mentality and a strong culture of accountability, teamwork, and continuous improvement. Conduct safety meetings and workplace inspections, address hazards, and ensure work is performed in accordance with company policies and applicable safety requirements.
What they're looking for
- Previous supervisory, lead technician, or crew-leadership experience, with the ability to coach technicians and provide technical direction in the field
- Minimum of 5 years of mining maintenance experience, with strong hands-on experience supporting heavy mobile mining equipment
- Strong troubleshooting and failure-analysis skills across mechanical, hydraulic, and electrical systems, including the ability to read hydraulic and electrical schematics, welding experience is a plus
- Experience with Caterpillar mobile mining equipment and electronic diagnostic tools, familiarity with CAT ET, CAT SIS, and direct experience with CAT 777 haul trucks and/or CAT 992K wheel loaders is strongly preferred
- Strong communication, organization, and problem-solving skills, with the ability to make decisions, take ownership, and work effectively in a growing operation where processes and systems are still being developed
- Experience using maintenance tracking systems and Microsoft Office applications
More about this role
Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
The Mobile Maintenance Supervisor is a hands-on working supervisor responsible for leading a team of maintenance technicians and supporting the safety, reliability, and availability of Mariana’s growing mobile mining fleet. This role combines technical leadership, field troubleshooting, crew development, maintenance planning, and day-to-day operational decision-making.
The ideal candidate will have a demonstrated track record of hands-on maintenance leadership, strong technical credibility, and a proactive, solutions-oriented approach to working in an evolving operation. They will enjoy solving problems in the field, developing technicians, improving processes, and helping build the systems, practices, and crew culture needed to support a growing fleet.
Lead, supervise, and develop a team of maintenance technicians while maintaining a safety-first mentality and...
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