Source: 2011 Inc. 500 and GeekWire, August 23, 2011. Schweitzer Engineering Laboratories (SEL) ranked as the 3,532nd fastest growing private company in the nation as compiled by Inc. magazine. Over the past three years, revenues have grown by 48% to $435.2 million. Schweitzer partners with customers around the world to ensure the safe, reliable, and economical delivery of electric power. The company designs, manufactures, and supports a complete line of products and services, ranging from generator and transmission protection to distribution automation and control systems. An employee-owned company, SEL’s core values drive the way we view our community, industry, company, and environment.