Candidate of Legal Sciences, Associate Professor. Author of the monograph “Electoral Systems: A Comparative Legal Study,” co-author of textbooks “Constitutional Law of Ukraine,” “Resolution of Election Disputes,” over 70 scientific, educational, and methodological works, as well as many analytical materials. Developer and trainer of training courses for judges of administrative courts and courts of general jurisdiction, national police, and election commissions. Participant in working groups on the development of draft laws in the fields of lobbying, political party activities, and holding elections. Fields of scientific and practical interests: electoral law and process, settlement of election disputes, responsibility for election offenses, political financing, electoral systems and collective decision-making, political rights, democracy, constitutional and legal responsibility, and constitutional law.