Maintenance Supervisor

About This Role

This critical leadership role is responsible for the end-to-end health of plant assets and the safety of the maintenance team. The Supervisor acts as a 'Guardian Angel' for their crew, ensuring that all stationary and mobile equipment—including crushers, conveyors, screens, and pumps—is maintained to maximize uptime and operational efficiency. This position coordinates repair and maintenance activities at the Walstrum Quarry, balancing technical expertise with people management, focusing on proactive preventive maintenance (PM) strategies and rapid response to mechanical failures.

Responsibilities

• Conduct daily MSHA pre-shift inspections of equipment and work areas to identify and mitigate hazards
• Develop and execute daily and weekly maintenance schedules, prioritizing the maintenance backlog in coordination with the Plant Manager
• Oversee the repair and optimization of stationary equipment (conveyors, shakers, gearboxes) and mobile fleet assets
• Mentor junior technicians on safe maintenance practices, including Lock-Out/Tag-Out/Try-Out (LOTOTO)
• Overall responsibility for planning and staffing maintenance crew for a 4MTPY hard rock quarry
• Assist Management in the scheduling and timing of repairs to all equipment at the site
• Monitor plant operations daily to ensure production and QC standards are maintained and take corrective action when deficiencies occur
• Monitor and report on safety and production KPIs
• Ensure personnel comply with Federal, State and Company safety and environmental rules and regulations through daily inspections of site, plant machinery, equipment, personal activities and working conditions
• Develop and nurture empowered/self-directed work teams in all phases of the operation
• Purchase or direct the purchase of supplies and equipment in accordance with Martin Marietta’s Controllers policies and recommend vendors to reduce costs
• Coordinate staffing with the Plant Manager and Assistant Plant Manager to operate the plant and coordinate the same needs with labor law compliance and affirmative action with the Human Resource Department, properly and safely
• Supervisory responsibility involving staffing, performance appraisals, training and development, promotions, salary increases, discipline, and motivating staff
• Assist in the development of the annual human resources business plan and ensure continual development of employees through training, cross-training and other development tools
• Manage proper inventory levels of parts needed to maintain target uptime, including but not limited to screen panels, GET, wear metal, bearings, and miscellaneous consumables such as welding rod and torching supplies
• Maintain operation security

Requirements

• High school diploma, GED, or relevant experience
• 4+ years in related Heavy Industrial Maintenance (Aggregates, Mining, or Construction preferred)
• Production process and methods
• Quality Control methods
• MSHA regulations and compliance
• Critical thinking
• Problem-solving
• EPA
• Resource management
• Effective communicator (written and spoken)
• Ability to lift and carry up to 50 lbs. for plant maintenance and equipment servicing
• Ability to bend, stoop, climb, and reach
• Ability to maintain three points of contact when climbing on/off machinery or on ladders
• Strong hand-eye-foot coordination for operating hand/foot controls
• Good depth perception with or without seeing aid for distances up to 150 feet

Benefits

• Annual bonus program
• 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
• Employer-funded defined benefit pension plan
• Paid time off
• Paid holidays
• Education/tuition assistance
• Employee discount program
• Adoption assistance
• Wellness programs
• Health Care Reimbursement Account
• Dependent Care Reimbursement Account
• Employee Assistance Plan
• Salary Continuation – Short-Term Disability
• Long-Term Disability Options
• Employee Life Insurance
• Spouse & Dependent Life Insurance
• Business Travel Accident Insurance
• Direct Deposit Payroll
• College Scholarship Program – for dependent children
• Matching Gift Program
• New Auto Purchase Discount Plans

Important Details

• Working conditions: outside assignments and periods of work in all weather conditions (cold, wet, dry, dusty); noise levels up to 85 dbs

About the Company

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 teams supply the foundational resources upon which communities thrive. Its Magnesia Specialties business produces high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications. Martin Marietta employs roughly 9,500 people.