Plant Operator I

Martin-Marietta-1798b2fd; Clarkdale (AZ); On-site; USD 42,000 - 62,000; Full time

Job summary

Martin Marietta is seeking a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant processing equipment, conduct inspections, and assist in training staff.

This role emphasizes safety, efficiency, and accurate reporting in an outdoor, weather-exposed environment. The position requires mechanical/technical aptitude, 0–1 year of plant operations experience, and adherence to MSHA and environmental guidelines.

Qualifications

• High School Diploma, GED, or equivalent work experience.
• 0–1 year of experience in Aggregate Plant Operations or similar Heavy Building Materials industry preferred.
• Mechanical/technical aptitude required.

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 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.

Skills

Mechanical aptitude

Technical aptitude

Plant components knowledge

Critical thinking

Time management

MSHA compliance

Effective communication

Education

High School Diploma

GED

Job description

JOB SUMMARYAs a Plant Operator at Martin Marietta, 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 RESPONSIBILITIESStart, 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.QUALIFICATIONSEducationHigh School Diploma, GED, or equivalent work experienceWork ExperienceNo prior experience is required; 6 months – 1 year of experience in Aggregate Plant Operations or similar Heavy Building Materials industry, preferred.Knowledge, Skills, and AbilitiesMechanical aptitudeTechnical aptitudeKnowledgeable of plant componentsCritical thinkingTime managementMSHA compliance and regulationsEffective communicator (written and spoken)ADDITIONAL DETAILSPhysical RequirementsMust 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 ConditionsAll 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.DisclaimersIn 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.