Sheryl Sandberg is Chief Operating Officer at Facebook and the author of Lean In: Women, Work, and the Will to Lead. Prior to Facebook, Sandberg was vice president of Global Online Sales and Operations at Google. She previously served as Chief of Staff for the United States Treasury Department under President Bill Clinton and began her career as an economist with the World Bank. She received B.A. and M.B.A degrees from Harvard University. Lean In.was adapted into Lean In: For Graduates, tailored for young adult graduates entering the workforce.