Professor at the University of Warsaw, Doctor of Laws, Head of the Department of Economic Analysis of Law, as well as Head of the Center for Regulatory Impact Assessment and Head of the Postgraduate Study of Legislative Issues at the Faculty of Law and Administration of the University of Warsaw.

Legal counsel, partner and managing partner at Jabłoński Kozminski & Partners Advocates and Legal Advisors. President of the Law and Economy Laboratory Foundation.

Expert of public institutions and non-governmental organizations, he also served as a member of supervisory boards of companies and drafted legal opinions and draft normative acts on behalf of Polish and foreign public authorities.