Mauro Arturo Rivera León is Assistant Professor at the University of Silesia in Katowice, Poland. From 2023 to 2024 he lead the Research Project “Qualified majorities in counter-majoritarian mechanisms: Towards a new theory of supermajorities in judicial review” funded by the Norwegian Financial Mechanism 2014–2021. He obtained his PhD at the Complutense University in Madrid, Spain. Dr. Rivera has been visiting researcher at the Max Planck Institute for Comparative Public Law and International Law in Heidelberg, Germany, the Perelman Center for Philosophy of Law at the Free University of Brussels, Belgium. He is a member of the National System of Quality Researchers in Mexico (CONAHCYT-SNI), level II (senior researcher). He is the author of six books, including four legal research monographs and more than fifty scientific papers/book chapters in Spanish, English, and Polish. He has received seven national prizes for his research.