1. Doctor in Labor Economics, Károly Ihrig Doctoral School of Management and Business Debrecen, University of Debrecen
2. Doctor of the Hungarian Academy of Sciences (DSc), Professor, Institute of Applied Informatics and Logistics, University of Debrecen, Hungary; College of Business and Economics, University of Johannesburg
3. Ph.D., Candidate in Economics and Business, Károly Ihrig Doctoral School of Management and Business Debrecen, University of Debrecen
4. Doctor in Business, Károly Ihrig Doctoral School of Management and Business Debrecen, University of Debrecen
5. Ph.D., Associate Professor, Department of Human Resource Management, Institute of Management and Organizational Sciences, Faculty of Economics and Business, University of Debrecen