As a stationary engineer apprentice, you participate in a training program under the supervision of senior engineers and learn how to operate, repair, and maintain stationary mechanical systems. In this role, you may learn more about the daily operations of mechanical equipment, perform regular maintenance, interpret information from gauges and meters, and perform visual inspections to ensure that equipment is operating properly. Most stationary engineering apprentices focus on boiler systems, engines, and auxiliary equipment like pumps and compressors, but these details can vary by employer. Apprenticeships usually have a fixed length and typically include promotion to a full engineer if you do well during training.