MarissamayerYahoo! just announced Marissa Mayer has been named the company’s new CEO. Mayer’s previous experience includes 13 years at Google, where she was the VP of Search Product and most recently responsible for Local, Maps and location services.

According to Business Insider, Mayer was Google’s first female engineer. She helped launch over 100 new products and features including toolbar, iGoogle, Google Instant, Gmail, Google News and image, book and product search. She was also responsible for integrating Google Local into Google Everything search results.

Mayer, the fifth Yahoo! CEO in five years, follows Scott Thompson who resigned from his position after a scandal involving false credentials on his resume. According to LA Times, Yahoo! made the announcement after the markets closed. During the trading hours, shares fell $.09. However, in after hours trading, after the announcement was made, shares were up over 2%.