Journeyman Electrician license (Minnesota or equivalent) 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, including 2 years with heavy mobile mining equipment.
Experience with high-voltage systems (480V-7,200V) and associated safety practices.
Demonstrated proficiency in troubleshooting AC/DC electric drive systems and PLC-based control systems.
Responsibilities
Diagnose and repair electrical faults on mobile mining equipment such as haul trucks and electric shovels.
Maintain and overhaul AC/DC electric drive systems and associated control systems on ultra-class haul trucks.
Inspect and test electrical components, replacing as necessary to ensure functionality.
Support maintenance of autonomous haulage systems and collaborate on software updates with OEMs.
Conduct scheduled preventive and predictive maintenance activities, documenting results accurately in the CMMS.
Adhere to safety standards and regulations, enforcing proper procedures such as Lockout/Tagout (LOTO).
Mentor apprentice electricians and participate in continuous improvement and commissioning initiatives.
Benefits
Comprehensive medical, dental, and vision coverage with an HSA option.
401(k) retirement plan with 6% company match.
Life insurance and long-term disability coverage provided.
Paid Time Off (PTO) varies with tenure, plus paid holidays and floating holidays.
Full Job Description
Position Summary
The 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 Responsibilities
Reporting 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.
