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Verified Pay $39.83 per hour
Hours Full-time
Location Irwindale, California

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This job pays $11.09 per hour more than the average pay for similar jobs in your area.




About this job

Subsidiary: Sully Miller Holding Co.

United Rock Products is one of the companies that operates within Sully-Miller Contracting Co., the Colas USA subsidiary that operates throughout Southern California. We are part of Sully-Miller Companies consisting of Sully-Miller Contracting Co., Blue Diamond Materials and United Rock Products. Each company supports the other. United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt manufacturing, and Sully-Miller Contracting executes the projects. Mining of construction aggregates at United Rock Products in the San Gabriel Valley has taken place since 1916. Our top-rated 300-acre site is located in Irwindale, California, just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn more about United Rock Products visit

Throughout Colas USA, we provide competitive pay, outstanding benefits, career advancement opportunities, professional education, and extensive training for every employee. We pride ourselves on upholding the highest standards of safety, environmental conservation, and ethical conduct as we strive to grow our infrastructure products and services through empowering and developing our people, fostering innovation, utilizing new technology, and maximizing vertical integration at all levels of the company's value chain. To learn more about the Colas USA Family of Companies, please visit

United Rock Products, and the rest of the Colas USA Family of Companies, is part of the Colas Group, the worldwide leader in transportation infrastructure construction and maintenance. For information on our international network visit

Compensation Data


Job Summary

Under the supervision of the Maintenance Foreman and/or Site Manager, the Plant Mechanic is responsible to work independently on all maintenance and repair tasks within the aggregate plant.

Main Responsibilities

  • Examines and diagnoses problems, and repairs according to generally accepted methods. Discusses extensive or difficult in depth repairs with Foreman and/or Site Manager.
  • Performs routine scheduled maintenance as outlined by the Foreman and/or the Site Manager
  • Removes components for repair or replacement such as, but not limited to; motors, gearboxes, pulleys, bearings, rollers, conveyor belts, v-belts, pumps, screens, crushers etc.
  • Disassembles components, inspects parts for wear, and determines cause of failure.
  • Troubleshoots and repairs hydraulic systems, and components.
  • Inspects and replaces parts such as crusher liners, screen media, etc.
  • Overhauls or rebuilds serviceable components
  • Performs major welding and cutting -- must pass a welding/cutting test (certification strongly preferred).
  • Performs other duties as assigned.


  • 5 years minimum experience or similar industry experienced preferred
  • Must have knowledge of welding material, welding properties, and various type of metals
  • Must have welding experience
  • Must be able to perform bracing, welding, arc-welding and cutting tasks
  • Must know how to use tools required for the job
  • Must be able to change crusher liners without guidance of the Foreman and/or Site Manager

Physical Requirements

  • Ability to stand, sit, walk, bend, lift, stoop, kneel, twist, crouch, reach, balance, crawl, and climb
  • Good vision (naturally or with correction)
  • Able to lift 50 pounds on a routine basis
  • Able to work in wet and dry conditions and extreme heat and cold
  • Work in an environment that may include mechanical parts, airborne particles and moderate to loud noises requiring the consistent use of proper PPE
  • Ability to walk on uneven surfaces

Colas Inc. and its subsidiaries are an Equal Opportunity Employer. For details on the specifics of this commitment, please click here to view the EEO document. If you are an individual with a disability and require a reasonable accommodation to:
  • to meet the requirements of the role in which you are applying
  • complete any part of the application process
  • access or use the online application process and need an alternative method for applying

Please contact Colas Inc. at 973-290-9082 or send an email to .