Károly Szadai graduated from the Communication and Media Sciences Faculty of the University of Pécs.
Between 2000 and 2008, he was the president of the Hungarian Radio Public Foundation’s Board of Trustees and subsequently its vice-president. Between 2008 and 2010, he was the president of the Supervisory Board of Magyar Rádió Zrt., serving in the same position from 2011 at Duna Médiaszolgáltató Zrt. for nearly a decade.
His professional fields are Hungarian and Anglo-Saxon media, infocommunication and social media.
In 1990, he was one of the founding members of the International Children's Safety Service and has since been a member of its presidency.
He has advanced-level English skills.