Tele-Communications Inc.
In 1996, he was a co-founder of the @Home Network Broadband Internet service with Milo Medin, cable companies Tele-Communications Inc., Comcast and Cox Cable where he served as the company's first chief executive officer. In 1995, he was named partner at the Silicon Valley venture capital firm of Kleiner Perkins. He sits on several boards of directors of companies in which the firm has investments, including Hearst Television. He served as a member of the board of directors of Juniper Networks until May 2008.