Anton occupied various positions within the Hollabrunn Administration (Federal province of Lower Austria) before being appointed Director of the Department of Social Affairs. In 1995, he became Director of a nursing home. In 2004, he joined the SeneCura Group in Austria as Operations Director before being appointed Chief Executive Officer in 2015. Since 2019, Anton has been Chief Executive Officer for Central and Eastern Europe, regions which also include Austria, Croatia, the Czech Republic, Slovenia and Switzerland. Anton Kellner has an MBA in Management and Health from the Wirtschaftsuniversität (the University of Economic Sciences of Vienna).