Susan Arnold,President, Global Business Units Procter & Gamble (PG)

Arnold joined P&G in 1980 and held a number of marketing and management positions before becoming category manager of P&G's cosmetics business in Canada in 1990. In 1999, she was the first woman to reach a president-level position at P&G when she assumed global responsibility for the company's personal beauty business. She has a BA from the University of Pennsylvania and an MBA from the University of Pittsburgh. She is on the executive committee of Catalyst, the leading research and advisory organization working with businesses and the professions to expand workplace diversity and opportunities for women. Check out the annual report: Arnold's name comes right after CEO A.G. Lafley's - and that may understate her importance. Arnold is responsible for the day-to-day operations of the three global business units in the $76 billion company. An organic growth goal of 4% to 6% annually means adding billions of dollars to the top line every year. But Arnold has done it before, transforming the once-sleepy health and beauty business.