Martin Marietta Materials - - Responsibilities: Operate the excavator within the company guidelines and safety standards; Complete daily pre and post inspection of working areas and ensure they are equipped with adequate berms and roadways; Perform pre-shift safety inspection on equipment and report needed repairs to the supervisor; Ensure safe operations around conveyors, surge piles and crushers; Perform daily preventative maintenance - tire pressure, oil, grease, diesel fuel, hoses for leaks and all moving parts for proper function