Plant Operator

Production Florence, Arizona

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Description

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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").
QUALIFICATIONS
Education
High school diploma, GED, or relevant experience
Work Experience
1-2 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 communication (written and spoken)
Detail oriented
Time management
ADDITIONAL DETAILS
Physical Requirements
You must be able to lift and carry between 45 lbs and 50 lbs regularly.
Ability to climb stairs and ladders to heights up to 100 feet (e.g., to the top of silos or cement mixers).
Frequent bending, stooping, squatting, and reaching around equipment for maintenance and inspections.
Walking across steep or rough/uneven terrain throughout the yard.
Good hand-eye coordination is required to operate computer controls, hand controls, and foot pedals simultaneously.
Travel
On-site.
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.

A member of the S&P 500 Index, Martin Marietta is an American-based company and a leading supplier of heavy building materials – including aggregates, cement, ready-mixed concrete and asphalt. Through a network of operations spanning 28 states, Canada and the Bahamas, dedicated Martin Marietta teams supply the foundational resources upon which our communities thrive. Martin Marietta's Magnesia Specialties business produces high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications.

At Martin Marietta, we strive to work with the best and the brightest – those who have the potential to become our company's future leaders. Each of our roughly 9,500 people shares a common purpose regardless of their professional role or work environment. Together, we utilize our diverse skills and experiences to drive our company and its extraordinary culture forward. Our aim is to build on our foundation of success and help values-driven and hardworking people realize their full potential. When you decide to invest your career in Martin Marietta, you'll know what it's like to be respected, challenged and rewarded.

In return, we offer a highly competitive benefits package, including: 

  • Medical
  • Prescription Drug
  • Dental
  • Vision
  • Health Care Reimbursement Account
  • Dependent Care Reimbursement Account
  • Wellness Programs
  • Employee Assistance Plan
  • Paid Holidays and Vacation
  • 401(k) with Company matching
  • Pension
  • Salary Continuation – Short-Term Disability
  • Long-Term Disability Options
  • Employee Life Insurance
  • Spouse & Dependent Life Insurance
  • Business Travel Accident Insurance
  • Direct Deposit Payroll
  • Educational/Tuition Assistance Plan
  • College Scholarship Program – for dependent children
  • Matching Gift Program
  • New Auto Purchase Discount Plans

At Martin Marietta, we are proud to be an Equal Opportunity Employer. We are committed to providing an environment of mutual respect where equal employment opportunities are available to all qualified applicants and teammates. We celebrate diversity and commit that qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

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