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Robert Callahan, Ziff Davis Media

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What: Chairman-CEO
Where
: Ziff Davis Media, New York
Why
: Callahan became chairman-CEO of the technology publisher in 2002 when it was up against the ropes. Under his leadership, the company staved off bankruptcy and has seen its EBITDA grow every year except 2005, when it hired 205 people to ramp up its online offerings.
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