1964  –  1968 Trained as reprophotographer; professional education and graphic art training at the studio of his brother, Franz Gassner, MA; Opening of his own design office in Feldkich in 1976,  from 1987 in Schlins/Vorarlberg; from 1996 to 1999 external consultant and design head of the InterMedia course at the University of Applied Sciences, Dornbirn/Vorarlberg; Gassner’s works have received many international awards and have been widely published; in addition to regular commissions, Gassner also works internationally as a curator, lecturer and author. Gassner was appointed as honorary member of the Austrian professional association designaustria in 2023, he has been a member of AGI Alliance Graphique Internationale since 2000. In 2018, his daughter Andrea Gassner took over the studio and moved it to the city center of Feldkirch/Vorarlberg.