Senior Plant Maintenance

Martin Marietta; Lakeside (CA); On-site; USD 41,000 - 55,000; Full time

Benefits offered by this job

Medical, dental and vision insurance

401(k) with company match

Paid time off

Job summary

Martin Marietta in Lakeside, California, is seeking a Senior Plant Maintenance Specialist to inspect, troubleshoot, repair and install equipment across our aggregate plant operations. The role covers conveyors, pumps, gearboxes, and related electrical and structural tasks, with a focus on reliability and safe operations.

You will perform preventive maintenance, generate capacity and downtime reports, train peers, and collaborate with vendors and supervisors to meet company standards and

Qualifications

• 5+ years in heavy-duty maintenance, preferably aggregates.
• Strong critical thinking and problem-solving skills.
• Knowledge of engineering standards and regulatory compliance.
• Excellent oral and written communication.
• MSHA/OSHA safety focus.

Responsibilities

• Evaluate plant equipment to improve availability and yield.
• Identify trends to address systemic maintenance needs.
• Work with vendors to procure maintenance support.
• Maintain maintenance records in company systems.
• Perform MSHA pre-shift safety inspections.
• Prioritize safety, quality, and production.
• Repair pumps, conveyors, gearboxes, and screens to minimize downtime.
• Operate cranes, man-lifts, welding tools as needed.
• Fabricate and repair processing and mobile equipment.
• Ensure backlog reviews with supervisor/plant manager.
• Complete paperwork to stay compliant with Martin Marietta standards.
• Train and coach others on maintenance best practices.

Skills

Critical thinking

Problem solving

Engineering standards

Safety MSHA/OSHA

Regulatory compliance

Project management

Continuous improvement

Communication

Education

High School Diploma, GED, or equivalent experience

Job description

Sr Plant Maintenance

JOB SUMMARY

The Senior Plant Maintenance Specialist is responsible for inspecting, maintaining, troubleshooting, repairing, and installing a wide range of aggregate plant equipment to ensure safe and efficient operations. 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. The role performs preventive maintenance, equipment diagnostics, and fabrication or welding work as needed to minimize downtime and improve reliability. The Specialist actively supports safety initiatives, maintains detailed maintenance records, and partners with supervisors and vendors to ensure all repairs and upgrades meet company and regulatory standards.

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 information and data in respective technology 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 acceptable; technical training or coursework in maintenance or mechanical systems preferred

Work Experience

5+ years related experience in heavy-duty maintenance or related field, preferably in the aggregates industry.

Knowledge, Skills and Abilities

Critical thinking
Problem-solving
Engineering standards
Safety focus (MSHA/OSHA)
Regulatory compliance
Project Management
Continuous improvement
Effective oral and written communication

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.