Plant Operator – Aggregates & Mining

Martin Marietta; Clarkdale (AZ); On-site; USD 52,000 - 72,000; Full time

Job summary

Martin Marietta in Clarkdale, AZ is seeking a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant processing equipment, perform routine inspections, report defects, and maintain inventory of wear items.

You will help achieve production goals while keeping a clean, safe work site. Responsibilities include starting and adjusting crushers, screens, conveyors, and pumps, performing preventive maintenance, and assisting with training new staff.

Qualifications

• High school diploma or GED required or equivalent work experience.
• Basic mechanical and technical aptitude for plant equipment.
• Ability to read and interpret process instructions.
• Understanding of MSHA safety standards and regulations.
• Strong communication and teamwork abilities.

Responsibilities

• Start, monitor, and regulate crushers, screens, conveyors, feeders, and pumps in compliance with safety standards.
• Adjust process settings to ensure optimal material flow and quality.
• Operate mobile equipment such as skid steers and front-end loaders for loadout or clean-up.
• Conduct pre-shift and ongoing inspections; document daily reports accurately.
• Perform preventative maintenance: greasing, belt changes, bearing/pulley replacements.
• Identify malfunctions or blockages, shut down equipment safely, and alert for repairs.
• Maintain a tidy work area; control dust, spills, and debris around equipment.
• Adhere to MSHA policies; use proper PPE and safety procedures.
• Train new or temporary staff on equipment operation and safety.
• Support additional duties including cleaning, quality control, and rail loading.
• Maintain daily production records: activity levels, downtime, inventory control.
• Ensure compliance with environmental regulations for batch plant operations.

Skills

Mechanical aptitude

Technical aptitude

Plant components knowledge

Critical thinking

Time management

MSHA compliance

Effective communicator

Education

High School Diploma, GED, or equivalent work experience

Job description

Martin Marietta in Clarkdale, AZ is seeking a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant processing equipment, perform routine inspections, report defects, and maintain inventory of wear items.

You will help achieve production goals while keeping a clean, safe work site. Responsibilities include starting and adjusting crushers, screens, conveyors, and pumps, performing preventive maintenance, and assisting with training new staff.