Companies> People>David O. Sacks

David O. Sacks is the Founder and CEO of Yammer, Inc. He has been involved in the internet space for ten years as an entrepreneur, executive and investor, starting with PayPal in 1999. David was PayPal's Chief Operating Officer and product leader, taking the company from startup to IPO and eventual sale to eBay for $1.5 billion. Subsequently, he founded Geni.com, which is creating a family tree of the whole world, enabling millions of family members to connect, share, and preserve their lives. He also produced and financed the movie "Thank You For Smoking". He has a B.A. in Economics from Stanford University and a J.D. from the University of Chicago Law School.