During our more than 145-year history one thing has remained constant: PSE's focus on safe, reliable, affordable energy service. And we're proud of our legacy: a commitment to great customer service and helping to make our communities better places to live and work. Headquarters: Bellevue, Wash. Employees: 3,100 Customers: Approximately 1.2 million electric and over 900,000 natural gas. Service area: 6,000 square miles, primarily in Puget Sound region of Western Washington