Plant Operator I

Martin Marietta; Clarkdale (AZ); On-site; USD 42,000 - 60,000; Full time

Job summary

MartinMarietta is seeking a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant processing equipment, perform inspections, report defects, manage wear-item inventory, and help ensure consistent, high-quality output in a safe, clean site.

You will work under the Plant Manager and Supervisor, handling routine tasks and contributing to production goals while complying with MSHA and company safety policies.

Qualifications

• High school diploma or GED required; equivalent work experience acceptable.
• Strong mechanical and technical aptitude.
• Familiarity with plant components and safety standards.

Responsibilities

• Operate crushers, screens, conveyors, feeders, and pumps safely and efficiently.
• Adjust process settings for optimal material flow and quality.
• Perform pre-shift inspections and document daily reports.
• Conduct preventative maintenance tasks (greasing, cleaning, belt changes, etc.).
• Identify malfunctions, shut down equipment safely, and request repairs.
• Maintain tidy work area and ensure environmental and safety compliance.

Skills

Mechanical aptitude

Technical aptitude

Plant components

Critical thinking

Time management

MSHA compliance

Effective communication

Education

High School Diploma/GED or equivalent

Job description

Job Summary

As a Plant Operator at MartinMarietta, you will play a pivotal role in supporting our mining and aggregate production operations. Working under the direction of the Plant Manager and Supervisor, you'll be responsible for safely and efficiently operating, monitoring, and maintaining plant processing equipment; tasks including but not limited to—observing visual and auditory signals during operation, performing routine daily inspections of plant and mobile equipment, reporting defects to the supervisor, as well as maintaining and managing inventory levels of various wear items used throughout the plant site. You will be instrumental in achieving production goals by ensuring consistent, quality aggregate output and maintaining a clean, secure work environment.

Job Summary

As a Plant Operator at MartinMarietta, you will play a pivotal role in supporting our mining and aggregate production operations. Working under the direction of the Plant Manager and Supervisor, you'll be responsible for safely and efficiently operating, monitoring, and maintaining plant processing equipment; tasks including but not limited to—observing visual and auditory signals during operation, performing routine daily inspections of plant and mobile equipment, reporting defects to the supervisor, as well as maintaining and managing inventory levels of various wear items used throughout the plant site. You will be instrumental in achieving production goals by ensuring consistent, quality aggregate output and maintaining a clean, secure work environment.

Key Duties And 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 in line with job specifications.
• Operate mobile equipment such as skid steers and front-end loaders during load out or clean-up tasks.
• Conduct pre-shift and ongoing inspections of plant and mobile equipment, document daily reports accurately.
• Perform preventative maintenance tasks like greasing, cleaning, screen changes, belt splicing, and bearing or pulley replacements.
• Identify malfunctions or blockages, safely shut down equipment during emergencies, and initiate work requests for repairs.
• Maintain a tidy work area—clear spillage, dust, and debris around equipment and haul roads.
• Adhere to all MSHA and company safety policies, including proper PPE use.
• Communicate effectively with supervisors and teammates to ensure efficient workflow and safety compliance.
• Assist in training new or temporary staff on equipment operation and safety procedures.
• Take on additional duties—cleaning, quality control, rail loading as assigned by management.
• Maintain daily production reports, recording activity levels, downtime, and material inventory.
• Ensure compliance with environmental regulations regarding batch plant operations and dust control.

Qualifications

Education

High School Diploma, GED, or equivalent work experience

Work Experience

No prior experience is required; 6 months – 1 year of experience in Aggregate Plant Operations or similar Heavy Building Materials industry, preferred.

Knowledge, Skills, And Abilities

• Mechanical aptitude
• Technical aptitude
• Knowledgeable of plant components
• Critical thinking
• Time management
• MSHA compliance and regulations
• Effective communicator (written and spoken)

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.