A professional who supervises and coordinates activities of workers engaged in operation of winery cellars. Respnsibilities include:

• Directs workers in crushing grapes, fermenting and fortifying juice, finishing and aging wine, operating portable pumps to transfer wine, and racking wine (filtering).
• Inspects fermentation tanks for cleanliness and operation of valves and other accessories.
• Orders filling of tanks and adds yeast culture to must in tanks to promote fermentation.
• Turns valves to circulate ferment through heat exchangers or other devices to maintain vintage at specified temperature.
• Observes gauges and records readings.
• Performs other duties as described under supervisor master title.