Jack Welch (1935-2020) was the Executive Chairman of the Jack Welch Management Institute, an online MBA school with more than 1,000 students. Prior to this, for 20 years, he was Chairman and CEO of General Electric Company, which was named the world's most valuable corporation and was consistently voted the most admired company in the world by Fortune magazine. Welch was active in private equity and consulting, working with dozens of businesses in a wide variety of industries. Along with speaking to upwards of a million people around the world, CNBC named Jack Welch one of the Top 10 "Rebels, Icons and Leaders" of the past 25 years.