Završnik’s fields of research are criminology and criminal law. He focuses on issues related to philosophy of criminal law and crime and technology. He regularly contributes papers on cybercrime, cyber deviance and on-line control at the international scientific conferences (for instance, at annual conferences of the European Society of Criminology, Cyberspace Conferences at the Faculty of Law, Brno, Czech Republic, the Lex Informatica conference and the Regional Cybersecurity Forum hold by UN International Telecommunication Union). His articles are published in the leading Slovenian law journal (Pravnik), the leading criminological journal (Revija za kriminalistiko in kriminologijo) and the Masaryk University Journal of Law and Technology. Završnik has also contributed papers to several research projects at the Institute of criminology at the Faculty of Law Ljubljana and completed a doctorate in law with a doctorate grade cum laude (Homo Criminalis: the Images of Criminal in High-Tech Society, p. 290, forthcoming).
 
His scientific work was supported by World Federation of Scientists (Geneva), Central European University (Budapest), the International Executive Development Centre (Bled, Slovenia) and by University of Aarhus, the Medienstadt Leipzig e.V. and the Global Internet Governance Academic Network (Meissen, Germany). The Max-Planck-Institute for Foreign and International Criminal Law in Freiburg (Germany) granted him a post-doctoral scholarship for the research on cybercrime.
 
Research Networks and Activity:
 
Završnik is cooperating with researchers from „Vienna Group“ (University of Bratislava, University of Brno, University of Pécs, University of Wroclaw, Vienna University of Economics and Business Administration) on issue related to law and technology.
 
He has helped co-organized several conferences, such as European Society of Criminology (ESC) annual conference in Ljubljana in September 2009, Conference Cybercrime and Digital Forensics, OLAF Conference (2008) and Slovenian National Criminological Conference (2007).
 
He occasionally lectures criminology at the post-graduate level at the Faculty of Law (University of Ljubljana), graduate level at the Faculty of Social Sciences (University of Ljubljana) and topics related to privacy issues in the digital age at the Faculty of Criminal Justice and Security (University of Maribor).