Lead Mobile Mechanic – Heavy Equipment & Fleet Tech

Martin-Marietta-1798b2fd; Golden (CO); On-site; USD 52,000 - 90,000; Full time

Benefits offered by this job

Medical, dental and vision coverage

401(k) with company match

Pension plan

Paid time off

Job summary

Martin Marietta is seeking a Master Mobile Mechanic to lead a mobile maintenance team across multiple sites in Colorado. You will diagnose complex issues on CAT and Komatsu heavy equipment, perform precision repairs, and ensure safety and MSHA compliance.

You will supervise rebuilds, manage equipment health, coordinate with procurement, and drive continuous fleet improvements while delivering high-quality workmanship and documentation.

Qualifications

• Advanced technical certifications in diesel mechanics, hydraulics, or welding preferred.
• 4+ years mobile equipment maintenance experience.
• Strong knowledge of MSHA safety regulations and field documentation.

Responsibilities

• Perform expert-level troubleshooting on diesel engines, hydraulics, electrics and drivetrains.
• Lead complex rebuilds, precision alignments, and fabrications.
• Mentor and train maintenance staff, ensuring quality workmanship.
• Ensure MSHA compliance and maintain accurate service records.

Skills

Diesel engines

Hydraulics

Electrical systems

Troubleshooting

Welding

Education

Vocational training or equivalent experience

Tools

CAT ET

Komatsu KOMTRAX

Komatsu Care

Job description

Martin Marietta is seeking a Master Mobile Mechanic to lead a mobile maintenance team across multiple sites in Colorado. You will diagnose complex issues on CAT and Komatsu heavy equipment, perform precision repairs, and ensure safety and MSHA compliance.

You will supervise rebuilds, manage equipment health, coordinate with procurement, and drive continuous fleet improvements while delivering high-quality workmanship and documentation.