A professional who tends baking oven that hardens and strengthens green sand cores used in casting metal. Respnsibilities include:

• Loads cores on racks, trays, or carts, and pushes them into oven.
• Lights gas- or oil-fired furnace and turns valves to obtain specified temperature; or sets thermostat and closes switch to heat element in electric furnace.
• Closes oven door and allows cores to bake for specified time.
• Opens oven door and removes cores.
• May adjust baffle plates that direct flow of heat in oven.