Oskar Leo Kaufmann, born 1969 in Bregenz, studied architecture at the Vienna University of Technology. 1996 Foundation of the architectural firm Kaufmann, together with John Kaufmann. 1997 Co-founding the firm KFN product merchant GmbH (Modular housing systems), 2001 Arch DI Oskar Leo Kaufmann Civil Engineers GmbH, 2005 Arch DI Oskar Leo Kaufmann Albert l Rüf Civil Engineering Ltd.. In 1994, his sister, the junior manager Susanne Kaufmann took over, the line of the now four star Hotel Post in Bezau. Inspired by the typical for the Kaufmann family were visionary thinking, soon to new changes in the Hotel Post.