Plant Operator

Jobvite, Inc.; Corona (CA); On-site; USD 48,000 - 55,000; Full time

Benefits offered by this job

Medical, dental, vision

401(k) with match

Pension plan

Paid time off

Job summary

Martin Marietta is seeking a Plant Operator to support mining and aggregate production. You will operate, monitor, and maintain plant equipment, perform inspections, document reports, and help manage material inventory to ensure quality output.

Position requires mechanical/technical aptitude, MSHA compliance, and strong communication. Outdoor work in all weather with potential overtime and training provided.

Qualifications

• High school diploma or GED required.
• 6–12 months experience in aggregate plant operations preferred.
• Mechanical and technical aptitude for plant equipment.

Responsibilities

• Operate crushers, screens, conveyors, feeders, and pumps safely.
• Adjust process settings for optimal material flow and quality.
• Operate skid steers and front-end loaders for load out.
• Perform pre-shift inspections and document daily reports.
• Conduct preventative maintenance such as greasing and belt changes.

Skills

Mechanical aptitude

Technical aptitude

Plant components

Critical thinking

Time management

MSHA compliance

Effective communicator

Education

High School Diploma / GED

Job description

JOB SUMMARY

As a Plant Operator at Martinandnbsp;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 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.andnbsp;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.

The hiring range for this position is $35 -$40 exclusive of benefits or bonuses (discretionary and non-discretionary). The offered base 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 hiring range for this role represents the base compensation we expect to pay for the position at time of hire and does not represent the total possible base pay of the position.

In addition to our base compensation, we also offer a competitive benefits package for full-time employees, including 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.