Rossnagel was born on 14 January, 1960, in Neckarsulm. In 1980 Rossnagel began studying Industrial Design at Essen University. From October 1983 to September 1984 he attended the London Central School of Art & Design. He then returned to Essen from where he graduated in March 1986. From October 1986 to September 1987 Rossnagel studied Transportation Design at the Art Center College of Design in Pasadena, California (USA). His professional career began in 1987 in the Exterior Design Department at AUDI AG. From October 1991 he worked in Japan as Design Manager for Volkswagen Technical Representative Tokyo. Following his return to Germany, Rossnagel was Design Strategist for Volkswagen AG in Wolfsburg from 1994 to 1998. In 1998 he moved to Asia once again, this time to Shanghai. As Design Manager he built up the Volkswagen Design Center there and was in charge of this until July 2000. From August 2000 to August 2003 he worked as Design Strategist at Volkswagen in Wolfsburg. From September 2003 to March 2006 Rossnagel has been Head of Concept Design Munich for the Audi brand group. Since April 2006 he has been responsible for Design Research and universitydesign projects at the Audi group design.