Professor of Philosophy in the Faculty of Philosophy of the Complutense University of Madrid. He is the author of Heidegger and the crisis of modern times (1987, 2006), Hermeneutics transformation of phenomenology. One interpretation of Heidegger's early work (1997), the subject and the truth (2004) and editor of ontological thought Methods (2002). He has translated and introduced the writings of the German University of Martin Heidegger. He has also published numerous articles and contributed to many collective volumes in the fields of ethics, phenomenology and hermeneutics. He was invited in several Latin American universities (Puerto Rico, Colombia, Brazil, Chile, Mexico) teacher.