Plant Operator (Wash Plant)

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

JOB SUMMARY

As a Plant Operator at Martin Marietta,youwillplay a pivotal role in supporting our mining and aggregate production operations. Working under the direction of the Plant Manager andSupervisor, you'll be responsible for safely and efficiently operating, monitoring, and maintaining plant processing equipment; tasks including but not limited to—observing visualand 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.Youwillbe instrumental in achieving production goals by ensuring consistent, quality aggregate output andmaintaininga clean, secure work environment.

KEYDUTIESANDRESPONSIBILITIES

• Start,monitor, and regulate crushers, screens, conveyors, feeders, and pumps in compliance with safetystandards.
• Adjust process settings to ensureoptimalmaterial flow and quality in line with job specifications.
• Operate mobile equipment such as skid steers and front-end loaders duringloadout or clean-up tasks.
• Conduct pre-shift and ongoing inspections of plant and mobileequipment,document daily reports accurately.
• Perform preventative maintenance tasks like greasing, cleaning, screen changes, belt splicing, and bearing or pulley replacements.
• Identifymalfunctions 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.
• Assistin training new or temporary staff on equipment operation and safety procedures.
• Take onadditionalduties—cleaning, quality control, rail loading—as assigned bymanagement.
• Maintain daily production reports, recording activity levels, downtime, and material inventory.
• Ensure compliance with environmental regulationsregardingbatch plant operations and dust control.

QUALIFICATIONS

Education

High School Diploma, GED, or equivalent work experience

Work Experience

No prior experience isrequired; 6 months-1 yearof experience inAggregatePlantOperations or similarHeavyBuildingMaterials industry, preferred.

Knowledge, Skills,and Abilities

• Mechanical aptitude
• Technical aptitude
• Knowledgeable of plant components
• Critical thinking
• Time management
• MSHA compliance andregulations
• Effectivecommunicator (writtenand 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 tomaintainthree 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 depthperceptionwith or without seeing aid for distances up to 150 feet.

Working Conditions

All duties require outside assignmentsand requireperiods of work in all weather conditions, cold, wet,dryand dusty.

Must be able to work in areas where noise levels are up to 85dbs.

Disclaimers

In addition to the primary responsibilities outlined, the successful candidate may be expected to take on other tasks and assignments asrequired, 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.