MasTec - - Responsibilities: Control traffic passing near, in, or around work zone.; Clean or prepare construction sites to eliminate possible hazards.; Load, unload, or identify building materials, or tools, distributing them to the appropriate locations, according to project plans or specifications.; Measure, mark, or record openings or distances to layout areas where construction work will be performed.; Manual dig ditches or trenches, backfill excavations, or compact and level earth to grade specifications, using a variety of power and hand tools.