Uli Oesterle began his career in the early 1990s in the fanzine Comicstrich. Later, he also worked for other fanzines and magazines, such as SI-Kartuun, MogaMobo, Panel and Tentakel. As a member of the editorial team of Comicstrich, Oesterle founded an atelier in Munich with several of his colleagues. He earned his money by illustrating for Playboy, Cinema and Men's Health. 'Schläfenlappenphantasien', that appeared in 1999, was his first independent comic album. This black-and-white album collected several short stories dealing with big city topics, and nominated Oesterle for the Max-und-Moritz-Preis. Shortly after this first book, Oesterle released his first long story in colors, 'Frass'. He then began his long series 'Hector Umbra', about craziness.