Senior Mobile Mechanic: Fleet & Rebuild Expert

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

Benefits offered by this job

Medical, dental and vision coverage

Health savings accounts

401(k) with company match

Education/tuition assistance

Paid time off

Job summary

Martin Marietta is seeking a Master Mobile Mechanic to lead and perform expert maintenance on heavy mobile equipment across multiple sites. The role emphasizes diagnosing complex issues, performing precision repairs, mentoring technicians, and ensuring MSHA safety standards are met.

You will supervise complex rebuilds, manage yellow iron health, and provide on-the-job mentorship while maintaining documentation and improving fleet performance.

Qualifications

• Vocational training or equivalent experience.
• Advanced technical certifications in diesel mechanics, hydraulics, or welding preferred.
• 4+ years Mobile Equipment Maintenance Experience.
• CAT maintenance preferred.

Responsibilities

• Perform expert-level troubleshooting on diesel engines, hydraulic systems, electrical circuits, and drivetrains for heavy mobile equipment.
• Lead major component rebuilds, precision alignments, and fabrication tasks using advanced tools.
• Interpret complex electrical/hydraulic schematics to repair control systems.
• Lead root-cause analysis for recurring failures and implement corrective actions.
• Conduct post-repair testing to ensure compliance with manufacturer specs.
• Maintain accurate service records, diagnostic reports, and inventory logs.
• Coordinate maintenance strategies and capital projects with supervisors.

Skills

Welding & metalworking

Mechanical analysis

Troubleshooting

MSHA compliance

Critical thinking

Detail oriented

Time management

Safety awareness

On-site maintenance

Education

Vocational training or equivalent experience

Advanced technical certifications in diesel mechanics or welding

Job description

Martin Marietta is seeking a Master Mobile Mechanic to lead and perform expert maintenance on heavy mobile equipment across multiple sites. The role emphasizes diagnosing complex issues, performing precision repairs, mentoring technicians, and ensuring MSHA safety standards are met.

You will supervise complex rebuilds, manage yellow iron health, and provide on-the-job mentorship while maintaining documentation and improving fleet performance.