Large supermarkets may have many supervisors, each responsible for a different function. A degree in business, marketing, or a related field is helpful for a retail manager. However, some managers get their start on the floor of the grocery store as baggers, checkout clerks, or produce workers. Stores may promote from within. They fillet meat or fish or cut it into bite-sized pieces and sometimes add sauces to prepare it for eating.
Most butchers learn their trade informally on the job or through apprenticeship programs.
Some attend trade or vocational schools.