A sommelier is a wine steward, or a trained and knowledgeable wine professional, typically found in fine restaurants and across the hospitality industry. Sommeliers know which wines a restaurant has both on and off the wine list, and can help you find the right wine for your meal or occasion. A sommelier’s wine education has typically been accredited through professional organizations like the Court of Master Sommeliers or the Wine and Spirit Education Trust.

Source: Master Class