It may depend on the role. Whether the job involves electrical or plumbing, the required qualifications will be based on your ability to fix and maintain equipment, and infrastructure. That’s why many maintenance employees do choose to focus on a speciality such as repairing and maintaining radiators or carpentry. Although a general maintenance and repair worker can start work with a high school diploma, it is a good idea to further develop your career by attending technical education classes, postsecondary trade schools or vocational schools.