He was also a member of the Venice Commission of the Council of Europe (2005-2013) and a member of the Hungarian Constitutional Court (2007–2010).
Ia juga pernah menjadi anggota Komisi Venesia di Dewan Uni Eropa (2005-2013) dan menjadi salah satu hakim di Mahkamah Konstitusi Hongaria (2007-2010).