<Tr> <Th> Spouse (s) </Th> <Td> Brian Kraff (m . 1993; div. 1994) Dave Goldberg (m . 2004; d . 2015) </Td> </Tr> <Tr> <Th> Children </Th> <Td> 2 (with Goldberg) </Td> </Tr> <P> Sheryl Kara Sandberg (born August 28, 1969) is an American technology executive, activist, and author . She is the chief operating officer (COO) of Facebook and founder of Leanin.org . In June 2012, she was elected to the board of directors by the existing board members, becoming the first woman to serve on Facebook's board . Before she joined Facebook as its COO, Sandberg was vice president of global online sales and operations at Google, and was involved in launching Google's philanthropic arm Google.org . Before Google, Sandberg served as chief of staff for United States Secretary of the Treasury Lawrence Summers . </P> <P> In 2012, she was named in the Time 100, an annual list of the most influential people in the world according to Time magazine . As of June 2015, Sandberg is reported to be worth over US $1 billion, due to her stock holdings in Facebook and other companies . </P>

Who is the chief operating officer of facebook