Patricia Stonesifer has been a director at Amazon since 1997, helping the online retailer grow from an e-tail glimmer in Jeff Bezos' eye to the sales giant it has become. Stonesifer, who has served as chair of the Board of Regents of the Smithsonian Institution since January 2009, has been a senior advisor to the Bill and Melinda Gates Foundation since January 2008. Prior to that, she was CEO of the Gates Foundation from January 2006 to September 2008, and president and co-chair from June 1997 to January 2006.
In addition to being a private philanthropy adviser, Stonesifer was a director of Viacom. She previously worked at Microsoft in a variety of positions.