A sommelier (), or wine steward,'s a trained and knowledgeable wine professional, commonly working in fine restaurants, who specializes in all aspects of wine service. The role's more specialized and informed than that of a wine waiter. Description The principal work of a sommelier's in the area of wine procurement, storage, wine cellar rotation, and to provide expert advice to customers. A sommelier may also be responsible for the development of wine lists, This use of the term dates to a peri… (More on Sommelier)