EVP, Global People Division Wal-Mart Stores 2010 rank: 23 Age: 54
Sheís arguably got the biggest job in HR -- overseeing Americaís largest private workforce. This year she helped launch a program guaranteeing Wal-Mart military employees
and spouses a job if theyíre relocated by the armed forces.
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the womanís business in the global economy, the health and direction of the
business, the arc of the womanís career (resume and runway ahead), and societal and cultural influence.