Plant Operator

Martin Marietta; Golden (CO); On-site; USD 36,000 - 48,000; Full time

Job summary

Martin Marietta in Colorado seeks a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant processing equipment under the Plant Manager and Supervisor, perform daily inspections, report defects, and manage inventory of wear items to ensure quality output and a safe, clean site.

The role requires a high school diploma or GED, no prior experience is required (6 months–1 year in aggregate plant ops preferred), and adherence to MSHA safety policies.

Qualifications

• High School Diploma, GED, or equivalent work experience.
• No prior experience is required; 6 months–1 year of experience in Aggregate Plant Operations or similar Heavy Building Materials industry, preferred.
• MSHA compliance and regulations; strong mechanical/technical aptitude; good communication and teamwork.

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 during loadout or clean-up tasks.
• Conduct pre-shift and ongoing inspections of plant and mobile equipment; document daily reports.
• 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.
• 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.

Skills

Mechanical aptitude

Technical aptitude

Plant components

Critical thinking

Time management

MSHA compliance

Effective communication

Education

High School Diploma, GED, or equivalent work experience

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.

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 regulations regarding batch 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

• 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 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 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.

COMPENSATION

The base range for this position is $26.00 - $35.00; exclusive of benefits or bonuses (discretionary and non-discretionary). The offered base hourly compensation will be determined based on factors such as geographic location, business need, market conditions, proficiencies, skills, education, and experience. Additionally, at Martin Marietta we place a high value on internal pay equity and will consider the compensation for those in similarly situated roles and direct team members. The posted range for this role represents the total reasonable pay range and does not solely represent a hiring range. Therefore, hiring at the top or maximum of the range should not be expected as it would not allow for salary growth opportunities in the role, would diminish promotion value, and may not align with internal equity. In addition to our base compensation, we also offer a competitive benefits package for full time employees (more information on benefits listed below).

At Martin Marietta, we offer a variety of benefits, depending on union classification which could include medical, dental and vision coverage; prescription drug coverage; health savings accounts; flexible spending accounts; life, AD&D and disability insurance; 401(k) with a company match and an employer-funded defined benefit pension plan. Other benefits include paid time off, paid holidays, education/tuition assistance, an employee discount program, adoption assistance, wellness programs and more.

Part time employees are eligible to participate in the 401k plan and receive a company match. In addition, they are eligible to start accruing service for the pension plan.