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23. Susan Chambers
EVP, Global People Division
Wal-Mart Stores (WMT)
2009 rank: 24
Age: 53

She calls the shots on everything from recruitment to benefits and pay for Wal-Mart's two million employees around the world. The only woman reporting directly to CEO Mike Duke, she also oversees Wal-Mart's ethics office.

NEXT: Sallie Krawcheck
Last updated September 30 2010: 2:47 PM ET
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