As a stationary engineer, you are in charge of the stationary motors, boilers, turbines, ventilation, air conditioning and heating systems for large facilities. Your responsibilities include checking the system pressure and water levels and performing general maintenance, such as replacing worn parts with new ones before they become a problem. The duties of a stationary engineer may vary somewhat depending on where they work. Some examples of facilities that hire stationary engineers are hotels, malls, factories, and warehouses.