President & CEO, Yahoo!
Marissa Mayer is president and CEO of Yahoo!, a role she assumed in July 2012. Before that she spent 13 years at Google, having joined the company as a software engineer—employee number 20—in 1999. Mayer oversaw the explosive growth of Google Search and its extension into areas like image, book, and product search. She also led the development of many popular services, including Google News and Gmail, and is listed as an inventor on several patents in artificial intelligence and interface design. From 2010 to 2012, she was vice president in charge of the company’s local and geographical products, including Google Maps, Google Earth, and Street View. Mayer earned her masters degree in computer science from Stanford, where she also taught programming. She serves on the boards of Walmart and several nonprofits, including the San Francisco Museum of Modern Art, San Francisco Ballet, and New York City Ballet.