Dick Costolo has been Twitter’s CEO since 2010. He is responsible for the growth and management of the overall business. Previously, as chief operating officer, he oversaw monetization and day-to-day operations. Before joining Twitter, Costolo was co-founder and CEO of FeedBurner, a digital content syndication platform that was acquired by Google in 2007. Earlier in his career, Costolo founded and ran two digital media companies: SpyOnIt, a Web page monitoring service, and Burning Door Networked Media, a Web design and development consulting company.