Andrew J. McKenna

AGE: 82
OCCUPATION: Chairman, Schwarz Supply Source

Mr. Behind-the-Scenes in business and local philanthropy and considered an éminence grise among Chicago dealmakers, McKenna is nonexecutive chairman of the McDonald’s board and on the Aon board at an age when most directors have politely been told to go home.

MORE ON McKENNA: After-School Specials: Accomplished DePaul Alumni

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Photograph: Carl Wagner/Chicago Tribune