Carlos Castresana has been a practicing Attorney, Magistrate, Investigating Judge and Public Prosecutor for more than 30 years. In 1989 he became a member of the Career of Public Prosecutors of Spain. Since that time he has worked in the Prosecution Offices of Barcelona and Madrid, as well as in the Anti-drug and Anti-corruption Special Prosecution Offices. In 2005 he was promoted to the Supreme Court of Spain.
In 2007, the UN Secretary General appointed Dr. Castresana as Commissioner against Impunity in Guatemala, with the category of Assistant Secretary General of the UN. Dr. Castresana worked in this post until 2010. In recognition of his work in Guatemala Dr. Castresana received the Medal of Honor as Commendatore della Repubblica from Italy, the Grand Cross badge of Honor from Guatemala, the title of Officer of the Legion of Honor from France, and the Order of the Civil Merit from Spain.
He is also a Professor of Criminal Law at Carlos III University of Madrid, and International Criminal Law at the University of San Francisco, California, and Haverford College, Pennsylvania. Dr. Castresana is also a recipient of the National Award for Human Rights in Spain and holds the title of Doctor Honoris Causa from the University of Guadalajara, Mexico, and Central University of Chile. In 2016 he was awarded the First Prize for Transparency, Integrity and Fighting Corruption by the General Counsel of Lawyers of Spain and Transparency International. Currently, he is the Head of the Department of Criminal Law in Estudio Jurídico Ejaso, a law firm based in Spain and Portugal.