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Senior Plant Maintenance

Job in Irwindale, Los Angeles County, California, USA
Listing for: Martin Marietta Materials, Inc.
Full Time position
Listed on 2026-04-17
Job specializations:
  • Maintenance/Cleaning
    Maintenance Technician / Mechanic
Salary/Wage Range or Industry Benchmark: 31 - 40 USD Hourly USD 31.00 40.00 HOUR
Job Description & How to Apply Below

Maintenance, Irwindale, California

Salary: USD 31.00 - 40.00 hourly

The Senior Plant Maintenance Technician is a key technical leader responsible for ensuring the reliability, safety, and efficiency of plant equipment and systems. This includes stationary and mechanical systems such as conveyors, shakers, pumps, and gearboxes, as well as general facility maintenance involving electrical, plumbing, and basic structural systems.

Key Duties and Responsibilities
  • Performs evaluations of plant equipment seeking opportunities to improve availability, capability, and yield.
  • Studies trends to identify systemic plant maintenance needs.
  • Actively participates in broad-scale plant maintenance initiatives.
  • Works with vendors to procure plant maintenance support.
  • Develops reports on plant capacity and yield and related plant maintenance activities.
  • Maintains appropriate plant maintenance records of information and data in respective technological systems.
  • Conducts MSHA pre-shift safety inspections of equipment and work areas.
  • Prioritizes SAFETY first, followed by QUALITY and PRODUCTION.
  • Maximizes performance of stationary equipment by performing timely repairs and completing preventive maintenance according to the Maintenance Module.
  • Checks, repairs, and replaces pumps, conveyors, gearboxes, and screens to minimize downtime.
  • Operates cranes, man-lifts, welding and cutting tools, and other specialty equipment as needed.
  • Performs fabrication, erection, and repair of processing and mobile equipment.
  • Ensures maintenance backlog is reviewed and prioritized with the Supervisor and/or Plant Manager.
  • Completes all required paperwork to maintain equipment in compliance with Martin Marietta standards.
  • Trains and coaches other employees on maintenance best practices.
  • In addition to the primary responsibilities outlined, the successful candidate may be expected to take on other tasks and assignments as required, including but not limited to duties outside the typical scope of the role to support overall team operations and organizational needs. Flexibility and adaptability to evolving job demands are essential.
Qualifications Education

High school diploma, GED, or equivalent experience

Work Experience

3+ years of related experience in Heavy-Duty Maintenance or related field, preferably in the Aggregates Industry.

Knowledge, Skills, and Abilities
  • Equipment analysis and general repair concepts
  • Troubleshooting
  • Critical thinking
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Position Requirements
10+ Years work experience
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