Matthias studied law at the University of Vienna and the Rijkuniversiteit Groningen, received his Doctor of law degree from the University of Vienna in 2008. He entered the civil service in 2007, was a research assistant at the Austrian Supreme Administrative Court in 2007-2011; was a desk officer in the Constitutional Service at the Austrian Federal Chancellery in 2011-2012; desk officer in the former Austrian Data Protection Commission in 2011-2013. Since 2014 he is Deputy Director of the Austrian Data Protection Authority; Austrian representative in the Council of Europe Advisory Committee on Data Protection (T-PD); representative of the Austrian Data Protection Authority in WP 29 subgroups; reserve officer (Capt.) and legal advisor in the Austrian Federal Army.