Position SummaryThe Maintenance Electrician - Mobile Equipment plays a critical role in maintaining maximum availability and reliability of Mesabi Metallics' world-class mobile mining fleet. This role is responsible for the diagnosis, repair, preventive maintenance, and overhaul of all electrical systems on heavy mobile mining equipment, including ultra-class 400-ton Komatsu autonomous haul trucks, the electric rope shovel operating at 7,200 volts, electric drills, and support vehicles. The successful candidate will bring deep expertise in high-voltage DC and AC electric drive systems, autonomous vehicle technology interfaces, and industrial electrical systems in a demanding open-pit mine environment.
Job ResponsibilitiesReporting to the Maintenance Shift Supervisor - Mine, the Maintenance Electrician - Mobile Equipment will be responsible for the following:
Electrical Maintenance & Repair- Diagnose, troubleshoot, and repair electrical faults on mobile mining equipment including Komatsu 930E-5 400-ton haul trucks, P&H 2800XPB electric rope shovel, and related mobile fleet.
- Maintain, repair, and overhaul AC/DC electric drive systems, electric wheel motors, alternators, traction motors, and associated control systems on ultra-class haul trucks.
- Perform electrical maintenance on the 7,200V electric rope shovel systems including high-voltage trailing cables, transformer connections, and power distribution components.
- Inspect, test, and replace electrical components such as contactors, relays, circuit breakers, inverters, rectifiers, and motor control centers.
- Troubleshoot and repair programmable logic controllers (PLCs), variable frequency drives (VFDs), and onboard machine control systems.
Autonomous & Advanced Technology Systems- Support maintenance and troubleshooting of the Komatsu FrontRunner Autonomous Haulage System (AHS) onboard electronics, sensors, radar systems, and communication interfaces.
- Collaborate with OEM technicians and automation engineers on software updates, calibration, and diagnostic procedures for autonomous truck systems.
- Maintain GPS, proximity detection, collision avoidance, and machine monitoring systems on mobile equipment.
Preventive & Predictive Maintenance- Execute scheduled preventive maintenance (PM) on all electrical systems per OEM specifications and the site's computerized maintenance management system (CMMS).
- Conduct predictive maintenance activities including thermographic inspections, vibration analysis, and oil sampling to identify potential failures before they occur.
- Accurately record all maintenance activities, parts used, and equipment conditions in the CMMS (SAP or equivalent).
- Participate in Root Cause Analysis (RCA) for repetitive or significant electrical failures.
Safety & Compliance- Strictly adhere to all site safety standards, MSHA regulations (30 CFR), NFPA 70E electrical safety requirements, and Mesabi Metallics safety policies at all times.
- Maintain and enforce Lockout/Tagout (LOTO) procedures on all high-voltage and high-energy equipment.
- Participate in pre-shift safety meetings, Job Hazard Analyses (JHAs), and safety inspections.
- Promptly report all near-misses, incidents, and unsafe conditions; contribute to a culture of zero-harm.
- Work safely around high-voltage systems up to 7,200V per established energized electrical work procedures.
Collaboration & Continuous Improvement- Work closely with mechanical maintenance, operations, and engineering teams to minimize equipment downtime and maximize fleet availability.
- Mentor apprentice electricians and provide technical guidance to less experienced team members.
- Support commissioning and startup activities for new equipment and system upgrades.
- Identify and recommend opportunities for electrical system improvements, upgrades, and cost savings.
Skills and Qualifications- Demonstrated proficiency in troubleshooting AC/DC electric drive systems and electric traction motor systems.
- Working knowledge of high-voltage systems (480V-7,200V) and safe work practices in high-voltage environments.
- Experience with PLC-based control systems (Allen-Bradley, Siemens, or equivalent) and VFD troubleshooting.
- Proficiency reading and interpreting complex electrical schematics, wiring diagrams, and P&IDs.
- Experience with Komatsu electric drive haul trucks (930E series or equivalent) or similar ultra-class mining trucks.
- Familiarity with autonomous haulage systems (Komatsu FrontRunner AHS or similar).
- Experience on electric rope or hydraulic shovels (P&H, Bucyrus, Caterpillar, or equivalent).
- CMMS experience (SAP PM, Maximo, or equivalent). • MSHA Part 46 or Part 48 training certification.
- Experience in taconite, iron ore, or other hard-rock mining environments.
- Strong knowledge of MSHA regulations, NFPA 70E, and mining industry safety standards.
- Valid driver's license and ability to operate light-duty vehicles on a mine site.
- Ability to work rotating shifts, including nights, weekends, and holidays.
Education- Journeyman Electrician license (Minnesota or equivalent state) or equivalent combination of training and experience.
- Associate's degree or technical diploma in Electrical Technology, Industrial Electronics, or related field preferred.
- Minimum 5 years of experience as an industrial or mining electrician, with at least 2 years on heavy mobile mining equipment
Physical Requirements- Ability to lift and carry up to 50 lbs. regularly; occasional lifting up to 75 lbs. with assistance.
- Ability to climb, kneel, crouch, and work in confined or elevated spaces on large mobile equipment (heights up to 30+ feet).
- Must be able to work safely in an active open-pit mine environment subject to year-round northern Minnesota weather extremes (temperatures ranging from -30°F to +95°F).
- Must wear all required PPE including hard hat, safety glasses, hearing protection, steel-toed boots, high-visibility vest, and arc-flash rated clothing as required.
- Exposure to dust, noise, diesel exhaust, and vibration consistent with open-pit mining operations.
- Ability to pass and maintain MSHA-required physical standards for underground and surface mine operations.
Salary Range:- $38 - $44 per hour, depending on experience and qualifications.
Benefits:
- Health Insurance: Comprehensive medical, dental, and vision coverage with an HSA option.
- Retirement Plan: 401(k) with 6% company match.
- LTD, Life Insurance, and AD&D: Coverage provided by Mesabi Metallics.
- Paid Time Off (PTO):
- 0-5 Years: 120 hours per year.
- 5-10 Years: 160 hours per year.
- 10+ Years: 200 hours per year.
- Plus 9 paid holiday and 2 floating holidays.
