FORTUNE's annual ranking of America's leading businesswomen

29 of 50
29. Joanne Maguire
Joanne Maguire
EVP, Space Systems
Lockheed Martin
2010 rank: 31
Age: 57
Almost all of her business comes from the government, including her next big project: working on the replacement for the space shuttle. Revenue dropped about 5% in her division to $8.2 billion, but she managed to keep operating profits level.
Network with Lockheed Martin
From the October 17, 2011 issue
How we pick the Power 50
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.

Name 2010 total compensation
Safra A. Catz $42 million
Wellington J. Denahan-Norris $23.6 million
Carol Meyrowitz $19.2 million
Name Rank
Cynthia Carroll 1
Gail Kelly 2
Marjorie Scardino 3