FORTUNE's annual ranking of America's leading businesswomen

36 of 50
36. Susan Chambers
Susan Chambers
EVP, Global People Division
Wal-Mart Stores
2011 rank: 22
Age: 55
Chambers is responsible for Wal-Mart's 2-millionñplus associates (that's roughly on par with the population of Houston), and she reports to CEO Mike Duke. The global ethics office is also under her purview. It is an area of focus as Wal-Mart faces allegations of bribery in its Mexico operations.
From the October 8, 2012 issue
How we pick the Power 50
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the woman's business in the global economy, the health and direction of the business, the arc of the woman's career (resume and runway ahead), and societal and cultural influence.