The definition of advertising, as we collectively understand it, has undergone a massive transformation in recent years. The modern agency looks nothing like it did before, with advertising today encompassing much more than traditional creative, including data, virtual and augmented reality, and even publishing. Agency titles and positions, as a result, are also evolving. We asked agencies across the board for the most unique and unconventional roles on their rosters, that have cropped up in recent years. Among the most unique ones: entrepreneur-in-residence and chief people officer.