John Doerr joined Kleiner Perkins Caufield & Byers in 1980 and has since backed some of the world's most successful entrepreneurs and companies, such as Google, Zynga and Amazon. John serves on the boards of Google, Zynga and Amyris. He also led KPCB's investment in Twitter. He is a member of the American Academy of Arts and Sciences, and was a member of U.S. President Barack Obama's Council on Jobs and Competitiveness. He has 291K followers on Twitter. His TED Talk on greentech has 845K views.