The Cement Gun Operator is responsible for spraying mortar over various surfaces, including masonry, steel, overhead bridge trestles, and embankments, under general supervision. Duties include building forms, installing mesh and steel reinforcing, erecting scaffolds, mixing dry mortar, operating gunite nozzles, and controlling water supply. The operator sprays mortar to form structures, cleans finished work, determines proper drainage angles, and performs minor maintenance on gunite machines. This role also involves leading a cement-finishing crew, estimating costs, and maintaining records and a database for gunite backlog. It requires one year of experience operating pneumatic power equipment, including a gunite nozzle, and possession of a valid California Class A or B Driver License and a recent DMV medical certificate.