Batch Plant Operator

Martin Marietta; Litchfield Park (AZ); On-site; USD 28,000 - 36,000; Full time

Job summary

The Plant Operator at Martin Marietta is responsible for the safe, efficient operation of a ready-mix concrete batching facility. You will learn to use computer-controlled mixing systems to proportion materials and support delivery scheduling.

This role blends technical monitoring with hands-on labor, emphasizes safety, quality, and environmental compliance, and requires clear communication with drivers and customers to maintain uptime.

Qualifications

• High school diploma, GED, or relevant experience
• 1+ years of experience in a Ready-Mix, Construction, or Heavy Industrial environment

Responsibilities

• Operate computer-controlled batching software to transfer materials into mixer trucks.
• Read orders to ensure correct mix design and slump.
• Monitor loading areas and truck positioning for efficiency.
• Print and file delivery tickets; maintain production and inventory records.
• Conduct pre- and post-shift inspections of silos and conveyors.
• Clean hoppers, mixers, and plant areas; use hand tools as needed.
• Assist maintenance with minor repairs and troubleshooting.
• Comply with OSHA, DOT, and Guardian Angel safety procedures.
• Perform Lockout/Tagout procedures when servicing equipment.
• Monitor dust collectors and environmental permit compliance.
• Coordinate with Dispatch to balance driver hours and on-time deliveries.
• Operate light mobile equipment to manage stockpiles.

Skills

Industry knowledge

Technical aptitude

Mechanical aptitude

OSHA regulations and compliance

Effective communicator

Detail oriented

Time management

Education

High school diploma, GED, or relevant experience

Job description

The Plant Operator is responsible for the safe and efficient operation of the plant. Position will assist with the scheduling of deliveries. Position reports to the Production Manager.

Job Summary

The Plant Operator is responsible for the safe and efficient operation of a ready-mix concrete batching facility. Under the direction of plant leadership, the Operator will learn to utilize computer-controlled systems to proportion raw materials into ready-mix trucks according to specific mix designs. This role is a blend of technical system monitoring and hands-on physical labor, requiring a high commitment to safety, quality control, and environmental compliance. Beyond technical batching, this role serves as a central hub for plant activities—coordinating with dispatch for delivery schedules, maintaining precise material inventories, and performing routine inspections to ensure maximum production uptime. The Operator is expected to maintain an uncompromising focus on safety, environmental compliance, and product quality while fostering a professional relationship with drivers and customers.

Key Duties And Responsibilities

• Operate computer-controlled batching software to transfer materials from storage bins through weigh hoppers and into mixer trucks.
• Read and interpret computer-delivered orders to ensure the correct mix design is selected and the appropriate slump is achieved.
• Visually monitor loading areas and truck positioning to ensure efficient and mess-free product delivery.
• Print, record, and file delivery tickets; maintain accurate daily records of production statistics, fuel usage, and raw material inventory.
• Perform daily pre-shift and post-shift inspections of silos, weigh hoppers, conveyors, and plant structures to ensure operational readiness.
• Clean hoppers, mixers, and plant grounds to prevent material buildup; utilize hand tools for shoveling, sweeping, and washing equipment.
• Diagnose process interruptions and assist maintenance teams with minor repairs, such as replacing air valves or clearing stuck gates.
• Maintain strict compliance with OSHA and DOT regulations, as well as Martin Marietta’s internal "Guardian Angel" safety culture.
• Demonstrate proficiency in Lockout/Tagout (LOTO) procedures during maintenance or clearing of equipment.
• Monitor dust collectors and water systems to ensure the plant operates within environmental permit guidelines.
• Monitor stockpiles and silo levels; assist management in ordering raw materials to prevent production delays.
• Communicate effectively with Dispatch to balance driver hours and ensure on-time delivery; provide customers with accurate product information when necessary.
• Safely operate mobile equipment, such as a front-end loader or skid steer, to maintain stockpiles or manage returned concrete (making "eco-blocks").

Education

High school diploma, GED, or relevant experience

Work Experience

1+ years of experience in a Ready-Mix, Construction, or Heavy Industrial environment

Knowledge, Skills, And Abilities

• Industry knowledge
• Technical aptitude
• Mechanical aptitude
• OSHA regulations and compliance
• Effective communicator (written and spoken)
• Detail oriented
• Time management

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.