Mobile Maintenance Supervisor

Mariana Minerals; Moab (UT); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Housing & Relocation options

Job summary

Mariana Minerals in Moab, Utah, seeks a Mobile Maintenance Supervisor to lead a team of technicians and ensure safety, reliability, and availability of our mobile mining fleet. The role blends hands-on troubleshooting, maintenance planning, and field leadership.

Ideal candidates have 5+ years in mining maintenance, strong technical credibility across mechanical, hydraulic, and electrical systems, and experience with CAT equipment. Relocation housing options available.

Qualifications

• 5+ years of mining maintenance experience with heavy equipment.
• Supervisory or crew-leadership experience.
• Ability to read hydraulic and electrical schematics; welding a plus.
• Experience with CAT mobile mining equipment and CAT ET/SIS.
• Strong communication and organizational skills.
• Proficient with maintenance tracking systems and MS Office.
• Experience with autonomous mining technology is a plus.
• Valid driver's license required.

Responsibilities

• Lead and develop a team of maintenance technicians with safety-first mentality.
• Conduct safety meetings and workplace inspections.
• Troubleshoot, diagnose, and repair heavy mobile mining equipment.
• Plan daily maintenance activities based on safety and production needs.
• Perform advanced troubleshooting using schematics and manuals.
• Drive reliability through preventative maintenance and downtime reduction.
• Coordinate with planners, operations, and vendors for repairs.
• Train technicians and provide on-call field leadership.

Skills

Supervisory experience

Mining maintenance

Troubleshooting

Mechanical systems

Hydraulic systems

Electrical systems

CAT ET

CAT SIS

CAT 777 haul trucks

CAT 992K wheel loaders

Diagnostics tools

Communication skills

Maintenance tracking systems

MS Office

Autonomous mining tech

Valid driver's license

Tools

CAT ET

CAT SIS

Job description

About Mariana Minerals

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 Role

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.

Responsibilities:

• 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.

• Work hands-on alongside technicians to troubleshoot, diagnose, and repair heavy mobile mining equipment, including mechanical, hydraulic, and electrical systems.

• Prioritize and coordinate daily maintenance activities based on safety, equipment criticality, production needs, labor, parts, and available resources.

• Perform advanced troubleshooting and failure analysis using diagnostic tools, schematics, technical manuals, and equipment documentation.

• Drive equipment reliability and availability through preventative maintenance, repair-quality review, equipment-status tracking, and identification of recurring failures.

• Coordinate with planners, operations, and vendors to schedule repairs, manage work orders, source parts, and communicate repair requirements and expected downtime.

• Train and mentor technicians, provide technical leadership in the field, and provide on-call support as needed, including serving as the senior maintenance representative when leadership may not be onsite.

Required Qualifications:

• 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.

• Experience with autonomous mining technology is a plus.

• Valid driver’s license required.

Working Environment and Schedule:

• Schedule: 7 days on / 7 days off, working 12-hour shifts. As operations expand, supervisors will rotate between day and night shifts and must be available for on-call coverage as needed.

• Work Environment: Approximately 70% fieldwork and 30% office-based work.

• Housing & Relocation: Housing and relocation assistance options are available

Our culture is built on four principles:

Everyone Gets Home Safe. We never put speed or cost ahead of people.

Extreme Ownership. We take full responsibility for outcomes, relentlessly driving toward solutions.

Engineer Out Requirements, then Automate. We simplify, optimize, and then automate for scale.

Share Your Legos. We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.

Join us as we build the future of responsible mineral sourcing and supply!