Prof. Calleja holds a PhD in Legal and Political Philosophy from Universidad Complutense de Madrid, where he graduated in Law. In addition, he has been Postdoctoral Research Fellow at IESE and visiting scholar at the Busch School of Business (Catholic University of America, Washington, D.C.) and the Mendoza College of Business (University of Notre Dame, Indiana). He has done three consecutive years of summer research at the NYU School of Law (New York).
Prof. Calleja has been an associate professor at the Centro Universitario Villanueva, and has taught ethics and other subjects in social philosophy at the University of Notre Dame, Holy Cross College en la Universidad de Montevideo and UNIS (Guatemala), among others.
Currently his research is focused on the development of political wisdom in business organizations and the contribution of business firms to the common good from a philosophical perspective. He is also studying on the moral and social aspects related to the technological incursion and the development of non-commercial strategies for the interaction of the firms in the sociopolitical settings. He has recently published in scientific publications, such as, Philosophy of Management, Journal of Corporate Citizenship, Journal of Management Development and Revista de Estudios Políticos.
Finally Prof. Calleja was director of a University Hall of Residence (Colegio Mayor) linked to the Universidad Complutense and a member of the Board of the National Association of Colegios Mayores. He frequently publishes articles in the Spanish press and is involved in citizen participation initiatives.