Skilled trades include plumbing, welding, electrical work, carpentry, HVAC installation and repair, solar panel or wind turbine installation, and some manufacturing jobs. The duties of skilled workers are to physically build, repair, or maintain. Any job that requires advanced training but not a college degree is usually considered a skilled trade. Preparation for these careers comes from a mix of practical experience and an apprenticeship under a skilled worker. For example, a furniture maker may spend several years learning the trade from a person with a cabinet making business before becoming a journeyman.