When the ­German multibillion-dollar enterprise software company tapped Saueressig as its new chief information officer, it made the native of Lobbach, Germany, the youngest-known CIO at a Fortune Global 500 company. ­Saueressig, who ­began coding at 6, started at SAP while still a student and rose quickly up the ladder. Now the millennial CIO—who’s a fan of U2 and The Big Bang Theory—is charged with implementing the ­company’s digital trans­formation strategy from within and shaping IT’s role in that strategy.