Sheryl Sandberg, Google's vice president of global online sales and operations, will jump to Facebook later this month to become the social-networking company's chief operating officer and help the company to grow globally.

Sandberg will report directly to CEO Mark Zuckerberg and oversee sales, marketing, business development, human resources, public policy, privacy and communications, Facebook announced Tuesday. Her first day at Facebook will be March 24.

Sandberg's main responsibilities at Google, where she has been since 2001, were online sales of the company's advertising and publishing products, as well as running the sales operations of Google's consumer products and Google Book search, according to information on Google's Web site.

Previously, she worked as chief of staff for the U.S. Treasury Department, as a management consultant with McKinsey & Co. and as an economist with The World Bank. She has a bachelor's degree in economics from Harvard University and an MBA from the Harvard Business School.

In a statement, Omid Kordestani, Google's senior vice president of global sales and business development, called Sandberg "a valued member of the Google team," wished her well and announced that she'll be replaced by David Fischer, an existing member of the global online sales unit.