A chef is a trained professional cook and tradesman who is proficient in all aspects of food preparation, often focusing on a particular cuisine. Chefs can receive formal training from an institution, as well as by apprenticing with an experienced chef.
A chef de partie, also known as a “station chef”, is in charge of a particular area of production. In large kitchens, each chef de partie might have several cooks or assistants. In most kitchens, however, the chef de partie is the only worker in that department.