Martin Marietta Materials - - Responsibilities: Performs scheduled maintenance on crushers, conveyors, screens, pumps, motors, and other plant equipment; Inspect, diagnose, and repair mechanical, hydraulic, and electrical systems to prevent breakdowns; Responds promptly to equipment failures and production interruptions; Operates cranes, man-lifts, welding and cutting tools, and other specialty equipment as needed; Trains and coaches other employees on maintenance practices