A professional who supervises and coordinates activities of workers engaged in crushing, grinding, and concentrating ore preparatory to further processing or shipment. Respnsibilities include:

• Observes meters, gauges, recording instruments, and operation of machines and equipment to detect malfunctions, faulty operation by worker, or need for repairs.
• Orders adjustments and repairs to restore machines and equipment to production specifications.
• Directs dismantling, and inspects parts to determine cause of malfunction or breakdown.
• Demonstrates and explains machine operation and processes to new workers.
• May determine time, duration, and sequence of utilizing ore from silos, and rates of extraction to attain blend of ore specified on work order.
• Performs duties as described under supervisor master title.