Aggregate Mine Plant Maintenance Supervisor

Martin Marietta; Weeping Water (NE); On-site; USD 70,000 - 90,000; Full time

Job summary

Martin Marietta in Nebraska is seeking a Plant Maintenance Supervisor to lead daily mechanical and electrical maintenance in an underground mine environment. You will train, schedule and guide hourly maintenance staff, drive safety, and ensure production targets are met.

Responsibilities include planning and scheduling maintenance, coordinating with dispatch and plant personnel, and maintaining documentation. Occasional travel and long hours are required.

Qualifications

• High school diploma or GED required; related experience helps.
• 4+ years of related maintenance experience preferred.
• Strong leadership and safety mindset required.

Responsibilities

• Supervise maintenance activities, including underground and surface mine maintenance, plant operations, and servicing all equipment.
• Collaborate with management on preventive maintenance for plant and mobile equipment.
• Lead and develop the hourly maintenance workforce.
• Ensure compliance with Company, Local, State and Federal rules and regulations.
• Drive operations toward production, safety, and environmental objectives and metrics.
• Plan and schedule maintenance to meet safety and production expectations; create and close work orders within 24 hours.
• Perform incidental and related duties as required and maintain documentation using Microsoft Office, JDE and other software.
• Other duties as assigned.

Skills

General Maintenance

Ethical Conduct

Teamwork

Leadership

Decision Making

Drive for Results

Attention to Detail

Analytical

Education

High school diploma/GED or equivalent

4+ years of related experience

Job description

Under the direction of the District Maintenance Manager, the Plant Maintenance Supervisor will assist in the day-to-day operations of mechanical and electrical maintenance activities associated with Predictive Maintenance (PdM), Unscheduled, and Preventative Maintenance scheduling (PM's), and repairs. Closely coordinating with dispatch and plant personnel preventing minimal downtime.

Description

The Plant Maintenance Supervisor is responsible for training, scheduling and the overall leadership of hourly maintenance employees. Key objectives include adherence to safety standards and production expectations.

Location

Weeping Water Mine is an underground limestone operation located near Weeping Water in Cass County, Nebraska. It is one of the largest and most productive limestone mines in the region, specializing in crushed and broken limestone for construction and industrial applications. The mine utilizes a room-and-pillar method for extraction and includes both underground and surface processing facilities.

Situated in Nebraska’s limestone-rich corridor, Weeping Water Mine plays a vital role in supporting infrastructure development across the Midwest. Its operations contribute significantly to the local economy, providing jobs and essential raw materials for roads, buildings, and other foundational projects.

Responsibilities

Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Responsible for supervising maintenance activities, which include underground and surface mine maintenance, plant operations and servicing all equipment.
• Work with management on preventive maintenance needs for the plant and mobile equipment
• Lead and develop the hourly maintenance workforce.
• Ensure compliance with Company, Local, State and Federal rules and regulations.
• Leads operations to established production, safety, and environmental objectives and metrics.
• Ability to complete and or ensure competent tasks in general maintenance, welding and electrical is completed to meet safety and production expectations.
• Responsible for the planning and scheduling of maintenance activities to meet safety and production expectations. Create work orders before work begins and close them out within 24 hours of completion
• Performs incidental and related duties as required and assigned.
• Maintain accurate documentation using Microsoft Office products, JDE and other software as needed
• Other duties as assigned

Skills

• General Maintenance
• Ethical Conduct
• Teamwork
• Leadership
• Decision Making
• Drive for Results
• Attention to Detail
• Analytical

Required Education And Experience

• High school diploma/GED or equivalent experience
• 4+ years of related experience
• Valid driver’s license

Work Environment

This job operates frequently in a maintenance and operations environment in an underground and surface mine location. This role routinely uses standard office equipment such as computers, phones, photocopiers, filing cabinets and fax machines.

Physical Demands

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Physical requirements include the ability to lift and carry up to 50 pounds from ground to waist, visual acuity, speech and hearing, hand and eye coordination, manual dexterity, repetitive motion, standing, sitting, walking, climbing stairs, bending and stooping, working from a elevated position and the ability to drive.

Position Type/Expected Hours of Work

This is a full-time position that regularly requires long hours and weekend work. Occasional travel will be required.