Certified Maintenance Supervisor - Harvey Mine Harvey Mine, 685 Patterson Creek Road, Sycamore, Pennsylvania, United States of America Job Description Posted Thursday, May 28, 2026 at 4:00 AM This position supervises a crew responsible for the maintenance of CM and/or LW machinery and equipment, and the maintenance of equipment and facilities so that high availability rates are maintained while meeting safety standards. Target Responsibilities Must adhere to CORE Natural Resources first principles including Safety, Sustainability, and Continuous Improvement Ensure the company's Absolute ZERO safety culture is embedded in all work performed Provides expertise in the maintenance of underground equipment and machinery to support longwall and/or continuous miner sections. Performs maintenance on one or more of the following: shuttle cars, feeder breakers and roof bolters, diesel and electric ram cars, water and dewatering pump systems, belt drives, conveyor systems, Ventilation fan...