A winemaker or vintner is a person engaged in winemaking. They are generally employed by wineries or wine companies, where their work includes:Cooperating with viticulturists Monitoring the maturity of grapes to ensure their quality and to determine the correct time for harvest Crushing and pressing grapes Monitoring the settling of juice and the fermentation of grape material Filtering the wine to remove remaining solids Testing the quality of wine by tasting Placing filtered wine in casks or tanks for storage and maturation Preparing plans for bottling wine once it has matured Making sure that quality is maintained when the wine is bottled

Winemaking, wine-making, or vinification is the production of wine, starting with the selection of the fruit, its fermentation into alcohol, and the bottling of the finished liquid. The history of wine-making stretches over millennia. There is evidence that suggests that the earliest wine production took place in Georgia and Iran around 6000 to 5000 B.C. The science of wine and winemaking is known as oenology. A winemaker may also be called a vintner. The growing of grapes is viticulture and there are many varieties of grapes.