Tren GriffinTren Griffin works at Microsoft. He was formerly a partner at Eagle River, a private equity firm controlled by Craig McCaw with investments in telecommunications and startups. From 1999 to 2001 he was vice president of strategy at XO Communications. n 1994, Griffin was the fourth person to join Teledesic, a global broadband satellite communications startup, which raised over a billion dollars at a valuation of more than $3 billion. Griffin previously worked as a consultant in Australia and Korea. He is the author of several books, including Charlie Munger: The Complete Investor. Read More Read Less