At a time when new enemies are emerging, Hewson is solidifying Lockheed Martin’s leadership in military defense technology. Her $9 billion acquisition of Sikorsky Aircraft in November 2015—Lockheed’s largest deal in more than a decade—made it the top manufacturer of military helicopters and boosted its expertise in drones. Hewson is also rejiggering Lockheed’s $46.1 billion business, having split off its IT and technical services division in August. The moves have added almost $10 billion to Lockheed’s market value over the past year alone.