A professional who controls machine equipped with cutting disks to mix binder and sand, and aerate sand used in construction of foundry molds and cores. Respnsibilities include:

• Sprays water over sand on foundry floor and adds binder (clay, flour, or molasses) to sand.
• Starts machine and steers it back and forth through pile to mix water, binder, and sand.
• Rubs sand through fingers to test cohesiveness of mixture and adds water or binder to sand to obtain mixture of desired consistency.