Where: Oracle Corp., Redwood Shores, Calif.
Why: Sim, who has been at Oracle for 19 years, is responsible for all corporate marketing. This year, she oversaw the launch of a brand campaign—”Software. Hardware. Complete.”—to promote the combined capabilities of Oracle and Sun Microsystems, which Oracle acquired in January for $7.4 billion. The campaign includes an “Iron Man 2”-themed ad, “Go From IT Hero to Super Hero.”