CEO, Chairman of the Board and President of AT&T Randall L. Stephenson took on these top executive roles in 2007. In these roles, Stephenson has solidified the company’s status as the world’s largest telecommunications company and international leader in mobile broadband and IP-based business communications services. With Stephenson at the helm, AT&T also has climbed up the TV services ladder as well as local search advertising. As COO from 2004 to 2007, he was responsible for wireless and wired operations. Other executive positions Stephenson has held at AT&T include: senior executive vice president, CFO member of the board of directors.