Alejandro Saiz Arnaiz holds a law degree from the University of Deusto (1979) and a PhD from the University of the Basque Country (1987). Since 2006, he has been a professor of Constitutional Law at Pompeu Fabra University. He has been a Jean Monnet Professor ad personam (2007-2010; 2016-2019; 2021-2024). He was a professor of Constitutional and European Law at the Judicial School (2000-2006). He received the "Rafael Martínez Emperador" research prize from the General Council of the Judiciary in 1998, and the "Tomás y Valiente" prize from the Constitutional Court and the Center for Political and Constitutional Studies in 2018. He served as an ad hoc judge at the European Court of Human Rights (2008-2015) and was a member of the Management Board of the European Union Agency for Fundamental Rights (2015-2020). He has been a visiting professor at the University of Trento and at Roma Tre University (2019-now).

The Jean Monnet Chair titled "Community of Law and Community of Judges: the European Judiciary and the Future of the Union” (2021-2024), explores the intricate relationship between national courts and the Court of Justice of the European Union. This chair emphasizes the importance of judicial cooperation and legal integration in ensuring the uniform application of EU law. By examining the harmonization of legal standards and the threats to judicial independence, this chair aims to safeguard the rule of law and strengthen the judiciary's role in upholding EU principles and values.

The Jean Monnet Chair titled "Linking European Judges: between the Charter and the Convention" (2016-2019), focused on the interplay between the EU Charter of Fundamental Rights and the European Convention on Human Rights. This chair pursued to bridge the gap between these two fundamental legal instruments, promoting coherence and synergy in their application. By fostering dialogue among European judges, this chair aimed to enhance mutual understanding and cooperation, ensuring that fundamental rights are effectively protected across Europe.

Finally, the Jean Monnet Chair ad personam in “European Constitutional Law" (2007-2010) was dedicated to the study and teaching of European constitutional law. This chair explored the foundational principles and evolving nature of the EU's constitutional framework. It examined the relationship between EU law and national constitutional orders, the role of constitutional courts, and the impact of constitutional developments on EU integration. Through research, teaching, and public engagement, this chair contributed to the deepening of knowledge and the development of a robust European constitutional culture.

Together, these Jean Monnet Chairs embody a commitment to academic excellence, fostering a deeper understanding of the European judiciary, fundamental rights, and constitutional law. They provide invaluable insights and recommendations for policymakers, legal practitioners, and scholars, contributing to the continued development and resilience of the European Union's legal and constitutional order. Through their work, these chairs have played a crucial role in shaping the future of the Union, promoting the rule of law, and protecting fundamental rights for all European citizens.