Andrés holds a degree in Law from the University of Deusto (Bilbao) and a PhD in Law (Cum Laude with honors) from the Complutense University of Madrid. He has been a Professor at Universidad Complutense de Madrid (Colegio Universitario Cardenal Cisneros), Universidad Europea de Madrid, Universidad Alfonso X el Sabio and Universidad Nebrija. He has also taught postgraduate courses at Escuela de Organización Industrial. He was Dean of the Faculty of Social Studies and Vice-Chancellor of Universidad Alfonso X El Sabio and Secretary General of Universidad Nebrija. He has served as Prosecutor assigned to the Provincial Prosecutor’s Office of Madrid for eight years. He has given several lectures at national and international level.

Currently, he is a Professor of Criminal Law and Criminal Procedural Law at ESERP (Universidad Rey Juan Carlos I), which he combines with the practice of law.