21. Bob Muglia, Juniper
Juniper Networks is proving a remarkably consistent setting for Microsoft veterans seeking a second-act; Kevin Johnson, Juniper's CEO, and Emilio Umeoka, its worldwide channel chief, are just two 'softies that have walked through the Juniper turnstile in recent years. In July 2011 came another: Bob Muglia, who was ousted from Microsoft following 23 years there and became Juniper's executive vice president, Software Solutions Division. With Juniper putting so much of its networking focus on data center software, Muglia's guidance could prove invaluable.