Matt Schuyler, the chief human resources officer at Hilton, has spent 10 years at the global hospitality company, after having worked for three others (Capital One, PwC, and Cisco) that have all been perennial companies on Fortune’s list of the 100 Best Companies to Work For. He discusses the many changes that have taken place over the past decade and reveals a few of the secret ingredients that help Hilton’s happy employees result in even happier hotel guests.