Professor of law, between 2008-2016 Rector of the University of Lodz, until 2022 head of the Tax Law Department of the Faculty of Law and Administration of the University of Lodz, founder (1997) and until 2022 head of the Centre of Tax Documentation and Studies. Author of four books and co-author or editor of fifteen ones. Prof. Nykiel wrote more than 120 articles, glosses and other studies. Lecturer at faculties of law in Bologna, Bari, Taranto (Italy), Grenoble and Tours - as professeur invité (France), and at Wirtschafts Universität in Vienna (Austria). Prof. Nykiel was, inter alia, a member of the Prime Minister's State Reforms Council (1998, 1999), a judge of the State Tribunal (1997-2001), the President of the State Examination Commission for Tax Advisers (2002-2007), a member of the Polish Legislative Council (2006-2010). He belongs to the European Association of Tax Law Professors (EATLP), he is a member of the Board of Trustees of the IBFD (International Bureau of Fiscal Documentation) in Amsterdam. Since 2002 he belongs to International Fiscal Association; in 2005-2011 he was a member of Executive Committee of this organisation. Prof. Nykiel is also a member of Lodz Scientific Society. He is the editor-in-chief of "Tax Law Quarterly" ("Kwartalnik Prawa Podatkowego"). Finally, he belongs to Programme Boards of "Tax Review" (Przegląd Podatkowy), "Law and Taxes" (Prawo i Podatki) and Advisory Board "EC Tax Review". Prof. Nykiel is a Member of Parliament of the Republic of Poland. In 2016 he was awarded a honorary doctorate from the University of Wrocław.