Christof Gassner was educated at the Kunstgewerbeschule Zürich under the guidance of Walter Käch and Josef Müller-Brockmann. Followed by various industry and publishing assignments. Then starting in 1966, set up own graphic design studio in Frankfurt am Main; relocated to Darmstadt in 1992. The design studio specializes in editorial design, corporate design, typography, poster, book and stamp design. In the 1980s: ecological projects, co-founder and art director of Öko-Test Magazin, 1986–2006: professor of graphic design and typography at the Fachhochschule Darmstadt and at the Kunsthochschule Kassel, then visiting lecturer in China.