32 of 50
32. Marillyn Hewson
EVP, Electronic Systems
Lockheed Martin (LMT)
Previous rank: New
Age: 56

After 26 years at Lockheed, Hewson took control of her own $13.5 billion division in January, which includes strike weapons and radar.

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Last updated September 30 2010: 2:47 PM ET
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