Plant Maintenance Mechanic

Martin Marietta; Sacaton (AZ); On-site; USD 28,000 - 52,000; Full time

Job summary

Martin Marietta is seeking a Plant Maintenance Technician for our Ready-Mix facility in Arizona. You will inspect, troubleshoot, repair, and proactively maintain stationary and mobile equipment to ensure safety and maximize production yield.

Responsibilities include maintaining batch plant equipment (conveyors, motors, gearboxes), completing lubrication and inspections, and performing MIG/Stick welding and torch cutting as needed. Strong OSHA compliance and documentation are essential.

Qualifications

• High school diploma or equivalent.
• 1+ year of heavy-duty maintenance experience.
• Ability to read diagrams and perform mechanical repairs.

Responsibilities

• Inspect and repair conveyors, shakers, pumps, and gearboxes.
• Maintain batching equipment such as scales and aerators.
• Troubleshoot air compressors, valves, and hydraulic lines.
• Perform welding and fabrication for equipment and structures.
• Conduct daily safety inspections and document findings.
• Coordinate with supervisors to minimize downtime.

Skills

Heavy-Duty Maintenance

Troubleshooting

Safety & OSHA awareness

Preventive maintenance

Education

High School Diploma

Tools

MIG Welding

Stick Welding

Torch Cutting

Electrical Testing Equipment

Job description

JOB SUMMARY

The Plant Maintenance Technician is responsible for the inspection, troubleshooting, repair, and proactive maintenance of all stationary and mobile equipment within a Ready-Mix concrete facility. This role is critical to ensuring "Safety First" operations while minimizing plant downtime and maximizing production yield.

Job Description

JOB SUMMARY The Plant Maintenance Technician is responsible for the inspection, troubleshooting, repair, and proactive maintenance of all stationary and mobile equipment within a Ready-Mix concrete facility. This role is critical to ensuring "Safety First" operations while minimizing plant downtime and maximizing production yield. You will be tasked with maintaining the mechanical integrity of the batch plant, including conveyors, motors, gearboxes, and pneumatic systems—while also performing facility-wide maintenance involving electrical, plumbing, and structural fabrication. The successful candidate acts as a key partner to the Plant Manager, ensuring all equipment meets Martin Marietta’s rigorous standards and regulatory requirements (OSHA).

Key Duties And Responsibilities

• Inspect, repair, and replace components on conveyor systems, shakers, pumps, and gearboxes to ensure continuous plant flow.
• Maintain and calibrate batching equipment, including scales, gate rams, aerators, and admixture dispensers.
• Troubleshoot and repair air compressors, cylinders, and valves essential for the operation of bin gates and material discharge.
• Perform mechanical repairs and preventative maintenance on rolling stock such as front-end loaders, skid steers, and occasionally assist with minor mixer truck repairs.
• Complete all lubrication, filter changes, and inspections according to the company’s Maintenance Module and schedule.
• Study equipment performance trends to identify systemic maintenance needs and suggest upgrades to improve plant availability and yield.
• Review and prioritize the maintenance backlog with the Supervisor/Plant Manager to address critical repairs during scheduled downtime.
• Perform professional-grade MIG/Stick welding and torch cutting for equipment fabrication, structural repair, and plant erection.
• Use electrical and pressure testing equipment to diagnose malfunctions in electrical circuits or hydraulic lines.
• Manage general facility maintenance including basic plumbing, lighting, and structural integrity of bins and silos.
• Conduct daily pre-shift safety inspections of equipment and work areas; identify and mitigate potential hazards immediately.
• Ensure all work complies with Martin Marietta safety standards, as well as OSHA and DOT regulations.
• Maintain accurate, detailed records of all maintenance activities, parts used, and safety inspections within the company’s digital tracking systems.
• Partner with outside vendors to procure specialty parts or specialized technical support for complex repairs.
• Operate mobile equipment (loaders, man-lifts) as needed to support production or facilitate repairs.

Qualifications

Education

High school diploma, GED, or relevant experience

Work Experience

1+ years of experience related to Heavy-Duty Maintenance jobs or equivalent combination of training and experience, preferably in Ready-Mix

Knowledge, Skills, and Abilities

Equipment analysis and general repair conceptsTroubleshootingOSHA compliance and regulationsProblem solvingDetail orientedTime 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.

Plant Maintenance Technicians are required to provide their own hand tools.

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 esse

In addition to the primary responsibilities outlined in the Job Description section, 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.

A member of the S&P 500 Index, Martin Marietta is an American-based company and a leading supplier of heavy building materials – including aggregates, cement, ready-mixed concrete and asphalt. Through a network of operations spanning 28 states, Canada and the Bahamas, dedicated Martin Marietta teams supply the foundational resources upon which our communities thrive. Martin Marietta's Magnesia Specialties business produces high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications.

At Martin Marietta, we strive to work with the best and the brightest – those who have the potential to become our company's future leaders. Each of our roughly 9,500 people shares a common purpose regardless of their professional role or work environment. Together, we utilize our diverse skills and experiences to drive our company and its extraordinary culture forward. Our aim is to build on our foundation of success and help values-driven and hardworking people realize their full potential. When you decide to invest your career in Martin Marietta, you'll know what it's like to be respected, challenged and rewarded.

In return, we offer a highly competitive benefits package, including:

• Medical
• Prescription Drug
• Dental
• Vision
• Health Care Reimbursement Account
• Dependent Care Reimbursement Account
• Wellness Programs
• Employee Assistance Plan
• Paid Holidays and Vacation
• 401(k) with Company matching
• Pension
• Salary Continuation – Short-Term Disability
• Long-Term Disability Options
• Employee Life Insurance
• Spouse & Dependent Life Insurance
• Business Travel Accident Insurance
• Direct Deposit Payroll
• Educational/Tuition Assistance Plan
• College Scholarship Program – for dependent children
• Matching Gift Program
• New Auto Purchase Discount Plans

At Martin Marietta, we are proud to be an Equal Opportunity Employer. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all qualified applicants and teammates. We celebrate diversity and commit that qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.