25 Most Powerful Women in Finance: 21-25

21. Martina Hund-Mejean
CFO, MasterCard Worldwide

In a time of industry upheaval, Martina Hund-Mejean has helped MasterCard to deliver revenue and earnings growth. She’s also played a big role in joint ventures and strategic acquisitions in key areas like prepaid cards, electronic commerce and mobile payments. Hund-Mejean began her career as a credit analyst with Dow Chemical in Frankfurt. She worked in finance at General Motors in both the U.K. and U.S., and was treasurer at Lucent Technologies before being plucked for the treasurer role at Tyco International in 2002 to help the company through a liquidity crisis. She has been with MasterCard since 2007.

"Finance teams must be embedded in the business and perceived not only as business partners, but also as advisers who are able to facilitate better decision-making."

22. Andrea Moss
President and CEO, American Express Centurion Bank

In what must have been at least something of a break from her work overseeing CARD Act compliance, Andrea Moss, CEO of American Express Centurion Bank, recently took time developing a system to manage customer complaints. What started as a data-logging system for 30 service representatives is now fed by 20,000 reps, whose customer interactions are analyzed for potential productivity gains. The time it takes to resolve problems is down sharply. And profits at the $27 billion-asset bank rose 44 percent last year.

"As a wife and mother of five, with a demanding career and active religious and civic responsibilities, each day is filled to the brim. I have set some foundational priorities that keep me grounded and remind me of what I am not willing to sacrifice."

23. Sandie O’Connor
Global Head of Prime Services, JPMorgan Chase

After dabbling in treasury services, Sandie O’Connor is back in the investment bank at JPMorgan Chase, as Wall Street’s only female head of a global prime services business. This summer she launched the firm’s prime brokerage platform in Europe. An expansion to Asia is on tap for next year. O’Connor, with J.P. Morgan since 1988, has worked in a variety of areas, including trading and liquidity management. She co-chairs the J.P. Morgan Investment Bank Women’s Network.

"This advice was offered by a mentor, and I’ve applied it to every stage in my career since: What we do is very important; how we do it is what defines us as leaders."

24. Suni Harford
Managing Director, Citigroup

Suni Harford runs North American sales, trading and origination for Citigroup’s markets business. With Citi finally back on more stable footing, Harford has been back on the road since 2010, spending as much as 50 percent of her time visiting clients and account teams. Her group has been climbing in the league tables, and headcount and profits are up. In addition to her business line responsibilities, Harford co-heads Citi’s corporate-wide initiative for developing female talent.

"Prioritize what must get done, what should get done, and what it would be nice to get done. Start at the top and if you get more than halfway through the ‘must’ section, call it a good day."

25. Kelly Williams
Managing Director, Credit Suisse

As head of the Customized Fund Investment Group at Credit Suisse, Kelly Williams manages one of the top private-equity fund-of-funds businesses in the world, with $27 billion in client commitments and investments in more than 800 private-equity and real-estate funds. In the past 18 months, CFIG has raised more than $1.1 billion from new investors outside the U.S., and won mandates to find local investing opportunities for public sector clients, including the state of North Carolina. Williams practiced law before co-founding CFIG in 1999. She is on the advisory board of private-equity funds including TPG Partners, TH Lee Partners and Blue Point Equity Partners.