CIOs have one of the hardest jobs in an organization. Years ago, CIOs focused primarily behind the scenes on the upkeep of companies’ computer systems. Most of their major decisions centered on three things — the kinds of technology a company would adopt, when and how much to pay for system upgrades, and the creation and maintenance of company websites. The rise of cloud computing, mobile, and security threats in recent years, though, have changed the job description. CIOs are now responsible for keeping everything safe, accessible and running smoothly. But what fears are keeping most CIOs and IT managers awake at night?