Although she’s most well-known as Facebook’s second in command (she joined as COO in 2008), Sheryl Sandberg previously worked as an executive at Google, for the United States Treasury Department and the World Bank after attending Harvard Business School. She is also on the board of Starbucks and Walt Disney.
 
David Goldberg started his first company, LAUNCH, at age 26 and sold it to Yahoo. He is currently CEO of SurveyMonkey.
 
Both leave work at 5:30 p.m. to be with their two kids.