From 1917 until 1933, Delavilla worked as a part-time scenic designer in Frankfurt and Darmstadt. In 1919, he was also a member of the Dresden Secession. In 1922, he became a teacher at the Städelschule in Frankfurt and led the lithography class. In 1923, he was appointed professor. In 1936, he and his colleagues Hugo Bäppler and Albert Windisch accepted a commission from the Ministry of the Reichswehr and designed with a class common rooms of the newly built Olympisches Dorf in Berlin. For this design with Merkbilder of the German landscape, he and his group received an Olympic Medal from Adolf Hitler.Hubert Salden (ed.): Die Städelschule Frankfurt am Main 1817 bis 1995. Hermann Schmidt, Mainz 1995, ,
