Željko Potočnjak is a Professor at the Department of Labour and Social Security Law. Since 1982, he has been a research assistant, assistant professor, associate professor, and, in 2003 he became a full professor. He has authored 129 scientific papers and articles. He is also the president of the Croatian Association for Labour and Social Security Law and a member of the Executive Committee of the International Society for Labour and Social Security Law. From April 2001 to April 2009, he served as a judge of the Constitutional Court of the Republic of Croatia. Since April 2009, he has been a full professor with tenure. From 26 January 2010 till 20 October 2021, he was a member of the National Competitiveness Council. During the academic year 2009/2010 and 2010/2011, he was the dean of the Faculty of Law. From 10 December 2014 till 10 December 2018, he was a member of the Governing Board of the Institute “Ruder Bošković”. From 22 February 2012 till 4 April 2023, he was a member of the Accreditation Council of the Croatian Agency for Science and Higher Education.