@FebFM10 - Electrical plant maintenance is a wide field, with jobs at plants varying in their scope of work. Most technician jobs require (at the minimum) a 2-year technical associate degree. Many also require a journeyman's license. The job positions that are lower in status are usually given to those with less education, with the higher paying jobs going to those holding a journeyman's license.
Supervisory positions are open to those people holding a master electrician's license or even an electrical engineer's degree, depending on the requirements of the job.