After earning her MBA, Wagner worked as vice president of the mortgage finance group for
Lehman Brothers. In 1988, Wagner and Ralph Schlosstein left Lehman to join Blackstone Financial Group. Later, Blackstone Financial Group changed their name to
BlackRock. As one of the co-founders of BlackRock in 1988, Wagner was vice chairman and chief operating officer. She orchestrated BlackRock's mergers and acquisitions, which included Quellos,
Merrill Lynch Investment Management, and
Barclays Global Investors. Prior to retiring from BlackRock in 2012, Wagner expanded the company into Asia, the Middle East and Brazil. Since retiring from BlackRock, she is on their board of directors, and a member of the board of trustees of the
Hackley School. In May 2014, Wagner was asked by Wellesley's class of 2014 to deliver the commencement address. In July 2014, Wagner was named to the board of
Apple Inc., replacing long-time board member
William Campbell. Wagner was the second woman on the Apple eight-member board and the only director with a background in finance. In 2014, she also was elected to the board of directors of
Swiss Re. == Awards ==