Equipment Operator II

Martin Marietta; Corona (CA); On-site; USD 41,328 - 55,104; Full time

Benefits offered by this job

Medical, dental and vision coverage

401(k) with company match

Paid time off and holidays

Tuition assistance

Job summary

Martin Marietta is seeking an Equipment Operator II in Corona, CA to safely operate heavy machinery and help transport raw materials from pit to plant. You will follow SOPs, assist with maintenance, and mentor junior operators to uphold safety standards.

The role requires 1+ years of experience in aggregates/mining, strong mechanical aptitude, and a proactive safety mindset. This is a full-time, on-site position with team support and ongoing training.

Qualifications

• High school diploma or equivalent required.
• Technician training or vocational certification preferred.
• 1+ years of heavy equipment experience in aggregate, construction, or mining environment.

Responsibilities

• Safely operate a variety of heavy equipment to transport raw materials from the pit to the plant at maximum loading capacity.
• Adjust equipment settings and operating techniques using SOPs to maximize throughput and minimize cycle times.
• Coordinate equipment positioning and sequencing to support site supervisors in optimizing production flows.
• Ensure all cargo is properly loaded according to safety requirements, preventing spills and maintaining vehicle stability.
• Strictly adhere to MSHA safety rules and Martin Marietta’s Guardian Angel programs.
• Maintain quarry integrity by ensuring haul roads, berms, and loading areas meet safety standards and site specifications.

Skills

Mechanical aptitude

Troubleshooting

Critical thinking

Safety focused

MSHA compliance

Regulatory compliance

Effective communication

Time management

Education

High school diploma, GED, or relevant experience

Job description

Job Summary

The Equipment Operator II is responsible for the safe and efficient operation of multiple types of heavy mobile equipment (including, but not limited to, loaders, excavators, and dozers) to facilitate the extraction, transportation, and processing of raw materials. This role goes beyond simple operation; the Operator II is a cross‑functional team member who maintains site infrastructure (roads and berms), performs critical preventative maintenance, and troubleshoots equipment malfunctions to maximize production uptime.

Operating under moderate supervision, this individual is expected to demonstrate advanced proficiency in material handling, ensure strict compliance with MSHA regulations, and assist in the training and mentoring Operators to maintain a high‑performance, safety‑first culture.

Key Duties and Responsibilities

• Safely operate a variety of heavy equipment to transport raw materials from the pit to the plant at maximum loading capacity.
• Adjust equipment settings and operational techniques using Standard Operating Procedures (SOPs) to maximize throughput and minimize cycle times.
• Coordinate equipment positioning and sequencing to support site supervisors in optimizing production flows.
• Ensure all cargo is properly loaded according to safety requirements, preventing spills and maintaining vehicle stability.
• Strictly adhere to all MSHA safety rules, as well as Martin Marietta’s Guardian Angel programs.
• Maintain the integrity of the quarry by ensuring haul roads, berms, and loading areas meet safety standards and site specifications.
• Facilitate and maintain safe traffic flow throughout the site, communicating via CB radio or hand signals to coordinate movement with co‑workers and customer trucks.
• Proactively identify and report site hazards, such as unstable highwalls, loose material, or electrical risks.
• Conduct thorough daily inspections of vehicle systems, hydraulic lines, tires, and safety accessories, documenting findings in official logs.
• Perform daily preventative maintenance (PMs), including greasing moving parts and checking oil, diesel, and coolant levels.
• Use mechanical aptitude to diagnose equipment malfunctions and perform minor repairs; promptly report significant mechanical failures to the maintenance shop.
• Assist the maintenance team with plant repairs and clean‑up, including the replacement of idlers, pulleys, and bearings during shutdowns.
• Aid in the training of co‑workers and junior operators on safe operation techniques, site protocols, and equipment maintenance.
• Provide operational support across various areas of the plant.
• Maintain professional and effective communication with Plant Operators, Supervisors, and external customers to ensure a cohesive work environment.

Qualifications

Education

High school diploma, GED, or relevant experience

Technical training and vocational certification is preferred

Work Experience

1+ years of relevant experience operating Heavy Equipment in an Aggregate, Construction, or Mining environment.

Knowledge, Skills, and Abilities

• Mechanical aptitude
• Troubleshooting
• Critical thinking
• Safety focused
• MSHA compliance and regulations
• Regulatory compliance
• Effective communication (written and spoken)
• Time management

Additional Details

Physical Requirements

Must be able to lift and carry up to 50 lbs. for plant maintenance and equipment servicing.

Required to bend, stoop, climb, and reach. You must be able to maintain three points of contact when climbing on/off machinery or on ladders.

Strong hand‑eye‑foot coordination is essential for operating hand/foot controls. You must have good depth perception with or without seeing aid for distances up to 150 feet.

Working Conditions

All duties require outside assignments and require periods of work in all weather conditions, cold, wet, dry and dusty. Must be able to work in areas where noise levels are up to 85 dbs.

Disclaimers

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.

The hiring range for this position is $30 -$40 exclusive of benefits or bonuses (discretionary and non‑discretionary). The offered base compensation will be determined based on factors such as geographic location, business need, market conditions, proficiencies, skills, education, and experience. Additionally, at Martin Marietta we place a high value on internal pay equity and will consider the compensation for those in similarly situated roles and direct team members. The hiring range for this role represents the base compensation we expect to pay for the position at time of hire and does not represent the total possible base pay of the position.

In addition to our base compensation, we also offer a competitive benefits package for full‑time employees, including medical, dental and vision coverage; prescription drug coverage; health savings accounts; flexible spending accounts; life, AD&D and disability insurance; 401(k) with a company match and an employer‑funded defined benefit pension plan. Other benefits include paid time off, paid holidays, education/tuition assistance, an employee discount program, adoption assistance, wellness programs and more.

Part time employees are eligible to participate in the 401k plan and receive a company match. In addition, they are eligible to start accruing service for the pension plan.