Google’s first female engineer and employee #20 leaves for Yahoo’s chief executive position.

By Angie Chang (Co-Founder & Editor-in-Chief, Women 2.0)

Today it was announced that Google’s Vice President of Local Marissa Mayer has left Google for the top position at Yahoo! as CEO.

Marissa Mayer will be CEO of Yahoo! effective tomorrow.

She will also take a seat on Yahoo!’s board of directors. Marissa currently sits on the on the board of Walmart as well as the boards of San Francisco Museum of Modern Art, the San Francisco Ballet, the New York City Ballet and the Smithsonian Cooper-Hewitt National Design Museum.

Taking the helm at Yahoo! will be no easy task as the company’s shares have been sliding for years. The last female CEO of Yahoo!, Carol Bartz, was fired last year. Is the appointment of Marissa Mayer a sign of the glass cliff phenomenon?

Marissa Mayer was at Google for 13 years, having joined Google as the first female engineer and employee #20 at the company. At Google, she ran product management and most recently served as Vice President of Local. Only time will tell how Marissa leads Yahoo! away from its current state.

Best of luck, Marissa!

Angie Chang co-founded Women 2.0 in 2006. She currently serves as Editor-In-Chief of Women 2.0 and is working to mainstream women in high-growth, high-tech entrepreneurship. Previously, Angie held roles in product management and web UI design. In 2008, Angie launched Bay Area Girl Geek Dinners, asking that guys come as the “+1” for once. Angie holds a B.A. in English and Social Welfare from UC Berkeley. Follow her on Twitter at @thisgirlangie.