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).