22. Thomas Richards
The IT sales execution kingpin has consistently delivered higher sales growth than the overall U.S. IT market since taking the helm nearly four years ago. In 2014, Thomas Richards delivered 12 percent sales growth, bringing annual sales to $12.1 billion. One of the secrets to his success: a laser focus on customers that has led to investments like a dedicated team of cloud client executives and a new mobility apps marketplace. Look for CDW to continue to outpace the market under Richards' leadership.