Brown & Root Industrial Services - - 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