Christian studied Communication, Politics and Economics at the University of Muenster (2000-2005). From 2006 to 2008, he worked as a research associate on the DFG (German Research Foundation) funded project “Journalism on the Internet”, which investigated the relationship between professional and participatory media in Germany. From 2006 to 2011 he also had been a doctoral candidate and research associate at the Department of Internet Research at the University of Muenster. Christian finished his PhD thesis in 2012. Since then, he has a position as post-doctoral researcher (“Akademischer Rat”) at the Chair of Media Change at the University of Munich (LMU). He also has been a visiting scholar at Queensland University of Technology (QUT) in Brisbane in 2013 and 2014. He has co-authored a book about Twitter (“Twitter and Journalism: The Influence of the Social Web on the News”) and co-edited “Journalism on the Internet” (both in German). In his doctoral thesis, he analyzed distinctions between the mass-mediated public sphere and the networked public sphere. In a corresponding case study, he further examined the role and the interconnectedness of media-related follow-up communication in the blogosphere. Publications of research findings in leading outlets such as Digital Journalism, Journalism Practice, Twitter and Society, and Routledge Companion for Social Media and Politics.