Following law school, she was an associate at the Chicago office of the law firm Sidley Austin, where she first met her husband.

Following law school, she was an associate at the Chicago office of the law firm Sidley Austin, where she first met her husband. At the firm, she worked on marketing and intellectual property. Subsequently, she held public sector positions in the Chicago city government as an Assistant to the Mayor, and as Assistant Commissioner of Planning and Development. In 1993, she became Executive Director for the Chicago office of Public Allies, a non-profit organization encouraging young people to work on social issues in nonprofit groups and government agencies. She worked there nearly four years and set fundraising records for the organization that still stood a dozen years after she left.

In 1996, Obama served as the Associate Dean of Student Services at the University of Chicago, where she developed the University's Community Service Center. In 2002, she began working for the University of Chicago Hospitals, first as executive director for community affairs and, beginning May, 2005, as Vice President for Community and External Affairs.

She continued to hold the University of Chicago Hospitals position during the primary campaign, but cut back to part time in order to spend time with her daughters as well as work for her husband's election; she subsequently took a leave of absence from her job.

She served as a salaried board member of TreeHouse Foods, Inc. (NYSE: THS), a major Wal-Mart supplier with whom she cut ties immediately after her husband made comments critical of Wal-Mart at an AFL-CIO forum in Trenton, New Jersey, on May 14, 2007. She serves on the board of directors of the Chicago Council on Global Affairs.

According to the couple’s 2006 income tax return, Michelle's salary was $273,618 from the University of Chicago Hospitals, while he had a salary of $157,082 from the United States Senate. The total Obama income, however, was $991,296 including $51,200 she earned as a member of the board of directors of TreeHouse Foods, plus investments and royalties from his books.