Master Mobile Mechanic
About The Position
The Master Mobile Mechanic combines advanced mechanical expertise with leadership responsibilities, ensuring the safe, efficient, and reliable operation of heavy mobile equipment, with a strong emphasis on high utility CAT and Komatsu earthmoving and aggregate equipment across multiple sites. You will diagnose complex issues, perform precision repairs, and mentor mechanics while driving continuous improvement in fleet performance. As the Master Mobile Mechanic, you are expected to serve as a technical lead, supervising complex rebuilds, managing yellow iron health, and providing on-the-job mentorship to the maintenance team while ensuring 100% compliance with MSHA and Martin Marietta standards.
Requirements
- Vocational training or equivalent experience
- 4+ years Mobile Equipment Maintenance Experience
- Welding and metalworking skills
- Mechanical analysis
- Design tools
- Mechanical controls
- Troubleshooting
- MSHA compliance and regulations
- Critical thinking skills
- Detail orientated
- Time management
Nice To Haves
- Advanced technical certifications in diesel mechanics, hydraulics, or welding preferred.
- CAT maintenance preferred
Responsibilities
- Perform expert-level troubleshooting on diesel engines, hydraulic systems, electrical circuits, and drivetrains for heavy mobile equipment (loaders, haul trucks, dozers, excavators).
- Utilize OEM-specific software (such as CAT Electronic Technician and Komatsu KOMTRAX/Komatsu Care) to interpret fault codes, monitor machine health, and perform calibrations.
- Execute major component rebuilds, precision alignments, and fabrication tasks using advanced tools and diagnostic software.
- Interpret complex electrical and hydraulic schematics to repair sophisticated control systems.
- Lead root-cause analysis for recurring mechanical failures and implement corrective actions to prevent downtime.
- Conduct post-repair testing and calibration to ensure equipment meets manufacturer specifications and operational requirements before returning to production.
- Perform expert-level welding and structural fabrication (MIG, TIG, Stick, and Plasma cutting) to repair cracked frames, buckets, and truck beds.
- Use micrometers, calipers, and dial indicators to verify tolerances on shafts, bearings, and interference fits during rebuilds.
- Enforce MSHA and company safety protocols during all maintenance activities.
- Ensure proper documentation of lockout/tagout procedures and hazard assessments.
- Maintain accurate service records, diagnostic reports, and inventory logs.
- Assist in budgeting for parts, tools, and equipment upgrades.
- Collaborate with procurement teams to source high-quality components and reduce lead times.
- Serve as the technical lead for Mobile Mechanics, providing guidance, training, and performance feedback.
- Coordinate complex repair projects and ensure compliance with safety and quality standards.
- Function as a resource for supervisors and managers in planning maintenance strategies and capital projects.
Benefits
- medical
- dental
- vision coverage
- prescription drug coverage
- health savings accounts
- flexible spending accounts
- life, AD&D and disability insurance
- 401(k) with a company match
- employer-funded defined benefit pension plan
- paid time off
- paid holidays
- education/tuition assistance
- employee discount program
- adoption assistance
- wellness programs
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
