Headquartered in Akron, Ohio, FirstEnergy includes one of the nation''s largest investor-owned electric systems, more than 24,000 miles of transmission lines that connect the Midwest and Mid-Atlantic regions, and a regulated generating fleet with a total capacity of more than 3,500 megawatts. Managing the business process for billing / rate issues, power quality and numerous complex customer issues, administering efficiency programs, and customer rate calculations, rebills, revenue protection and rate verifications.