Rosalind Brewer

IMG: via Walmart

Rosalind Brewer didn’t begin her career as a high-powered businesswoman. With a degree in chemistry, she started her 22-year tenure at Kimberly-Clark Corp as a scientist. Today, she is the President and CEO of Sam’s Club, a Wal-Mart revenue division.

How did Brewer advance from chemist to CEO? Step by step. Her relentless drive and ambition have led her to become one of the world’s most powerful women.

To read more about Rosalind Brewer, check out her complete profile.