Mark Zuckerberg is the CEO of Facebook, which he founded in 2004. Facebook is a social utility that helps people communicate more efficiently with their friends, families and coworkers. Mark is responsible for setting the overall direction and product strategy for the company. He leads the design of Facebook’s service and development of its core technology and infrastructure. Mark attended Harvard University and studied computer science before moving the company to Palo Alto, California.
Source - http://www.facebook.com/press/info.php?execbios