A professional who supervises and coordinates activities of workers engaged in transporting and mixing ingredients to make concrete. Respnsibilities include:

• Directs workers engaged in transferring sand and gravel aggregates by crane or other conveyor from barges and trucks to storage piles or bins.
• Reads specification sheets to determine sizes of aggregates and proportions of cement and water required for batch of concrete.
• Signals workers to charge mixing drums with specified amounts of ingredients and discharge mixed concrete into truck or other conveyor.
• May supervise workers engaged in assembling and dismantling plant at construction site.
• Performs other duties as described under supervisor master title.