As a property maintenance technician, you maintain and repair systems or fixtures within a residential or commercial property. Your duties vary depending on the type of building in which you work. In a residential setting, a maintenance technician can fix lighting, plumbing, or heating problems. You also install new fixtures or replace damaged or malfunctioning systems within the building or buildings on the property. The responsibilities of a maintenance technician can include performing scheduled work or upgrades. You are also usually on call to fix unexpected problems and perform repairs for tenants when needed.