Justice at the Constitutional Court of Hungary between 2010-2019.

Professor at the Széchenyi István University, and Eötvös Loránd University.

Founding Director of the István Bibó College at Eötvös Loránd University in Budapest (1982–1988). He also founded the Századvég Foundation, the first Hungarian think-thank, acting as its Director (1991–1998, 2002-2010); and he was the Deputy Prime Minister leading the Prime Minister’s Office between 1998-2002.

Holds university degrees in law and sociology and a PhD in political science. He spent years in the USA as a German Marshall Scholar and IREX scholar (Harvard University, Kennedy School of Government, and GWU, Graduate School of Political Management).

Senior Researcher at the Political Science Institute of the Hungarian Academy of Sciences since 1987.

Author and editor of numerous articles and books in the field of political socialisation, parties and party systems, electoral systems and behaviour, constitutional and governmental structures and separation of powers.

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Membership

Network of Institutes and Schools of Public Administration in Central and Eastern Europe (NISPACEE)

International Political Science Associationn (IPSA)

Research Committee for Comparative Studies of Electoral Systems

Hungarian Political Science Association

Hungarian Sociological Association

United Nations Association

Advisory Board of Saint Ignatius Jesuit College

European Judicial Network

Editorial boards of several scientific journals.