RESPONSIBILITIES - Operate jackhammers and drills to break up concrete or pavement - Position, join, align and seal structural components, such as concrete wall sections and pipes - Shovel cement and other materials into portable cement mixers: and mix, pour, and spread concrete - Signal equipment operators to facilitate alignment, movement and adjustment of machinery, equipment, and materials - Smooth and finish freshly poured cement or concrete, using floats, trowels, screeds, or powered cement finishing tools - Tend to machines that pump concrete, grout, and sand - Tend to pumps, compressors, and generators to provide power for tools, machinery, and equipment, or to heat and move materials such as asphalt - Lubricate, clean and repair machinery, equipment, and tools. - Dig ditches or trenches, backfill excavations, and compact and level earth to grade specifications, using picks, shovels, pneumatic tampers, and rakes.