Food preparation and serving supervisors oversee the kitchen and non-kitchen staff in a restaurant or food service facility. They may also oversee food preparation workers in fast food, cafeteria, or casual dining restaurants, where the menu is fairly standard from day to day, or in more formal restaurants, where a chef provides specific guidelines and exacting standards on how to prepare each item.

All of these workers—chefs, head cooks, and food preparation and serving supervisors—hire, train, and supervise staff, prepare cost estimates for food and supplies, set work schedules, order supplies, and ensure that the food service establishment runs efficiently and profitably. Additionally, these workers ensure that sanitation and safety standards are observed and comply with local regulations. Fresh food must be stored and cooked properly, work surfaces and dishes clean and sanitary, and staff and customers safe from illness or injury to avoid being closed by the health department or law enforcement.

While all chefs have a role in preparing the food, developing recipes, determining serving sizes, planning menus, ordering food supplies, and overseeing kitchen operations to ensure uniform quality and presentation of meals, different types of chefs may have unique roles to perform or specialize in certain aspects of the job. Executive chefs, head cooks, and chefs de cuisine, are primarily responsible for coordinating the work of the cooks and directing the preparation of meals. Executive chefs are in charge of all food service operations and also may supervise several kitchens of a hotel, restaurant or corporate dining operation. A sous chef, or sub chef, is the second-in-command and runs the kitchen in the absence of the chef. Many chefs earn fame both for themselves and for their kitchens because of the quality and distinctive nature of the food they serve.

While the work of chefs and head cooks is concentrated in the kitchen or in providing overall guidance, food preparation and serving supervisors oversee specific areas of operation in food service establishments or the kitchen and counter areas of quick service restaurants. In fast food and casual dining restaurants, they may share many of the same functions with food service managers. They are responsible for dealing with customer complaints, balancing the books at the end of the day, scheduling workers, and ordering supplies. They also supervise and train kitchen and food preparation staff and ensure that these workers know how to gather food supplies, operate equipment, and assemble orders.