Amazon Web Services is the cloud computing provider to beat, and Andy Jassy is the man at the helm. When AWS inked a $600 million contract last fall to build the CIA a cloud, it gave credibility to the on-fire division -- which Jassy has said could one day be bigger than Amazon's $60 billion retail business. It’s not so farfetched, considering the trillions of dollars companies spend on data center hardware and software and the likelihood of companies shifting computing to the cloud. “I feel very lucky to get to do what I am doing. I get to go to work every day on a business that is changing technology,” Jassy told The Wall Street Journal.