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Davie DeWalt
Davie DeWalt
CEO, McAfee

David DeWalt was a wrestling star in college, but now he's grappling with digital threats as the head of one of tech's largest security firms.

New technology also brings new challenges; he recently bought MX Logic, maker of security software for cloud computing.

NEXT: Greg Waldorf
Last updated September 01 2009: 11:30 AM ET
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