AP Photo

Joe Stewart’s day starts at 6:30 a.m. in Myrtle Beach, S.C., with a peanut butter sandwich, a sugar-free Red Bull, and 50,000 or so pieces of malware waiting in his e-mail in-box. Stewart, 42, is the director of malware research at Dell SecureWorks, a unit of Dell (DELL), and he spends his days hunting for Internet spies.