Gregor Bailar (born May 3, 1963) is a US technology executive, professional director, and philanthropist who held executive roles at Citibank, NASDAQ and Capital One. He managed technology and operations for the NASDAQ Stock Market during the dot.com boom and tragedy of 9/11. He led rescue operations during Katrina and the Beltway Sniper for Capital One. He has been cited as one of the most influential CIOs of the internet age and was inducted into the CIO Hall of Fame in 2007.