Dario Fenner grew up in Wettswil, a village near Zurich. He did an apprenticeship as a mechanic at a machine construction company before joining a firm which rebuilds engines for vintage cars. Since 2007 he has been working for three different institutes at ETH D-MAVT, manufacturing a variety of parts for prototypes. He also attends a school for technicians specialising in construction. In his spare time he likes to do sports, especially touring on his racing bike.