Mr. Geoff Ralston is a Co-Founder of Imagine K12. He serves as president at Y Combinator. He also serves as Partner at Y Combinator. He serves as Advisor and Board Member at Iris Automation. From 2007-2009, he served as Chief Executive Officer at Lala Media, an innovative cloud music start-up in Palo Alto that was purchased by Apple in December of 2009. He served as Board Member at Educents. He also worked at Yahoo! from 1997-2006 after their 1997 acquisition of Four11 Corp. At Four11, he served as VP of Engineering and led the creation of Yahoo! Mail's predecessor, RocketMail. At Yahoo! He served as Senior Vice President and General Manager at Communications Business Unit and subsequently served as the company's Chief Product Officer. He serves as an Advisor at Kodable. He is also an Angel Investor.