- Rabbi and Ph.D. in Philosophy, he combines his religious and scientist education working both, in community leadership and academic field on Jewish Philosophy research and lecturing at several universities and other cultural and educational institutions. He is also an advisor in interdisciplinary forums and committees .
- Rabbi Dr. Szlajen not only has developed many subject matters but also he has innovated in the field of Applied Jewish Philosophy, a discipline based on the scholar and methodological analysis of the Jewish cultural heritage, translating it into a relevant and instrumental manner to deal philosophically and technically with the contemporary most pressing issues found in different areas such as ethics, bioethics, education, environmental care, politics, gender and multiculturalism, among others.
- In his area of endeavour, Rabbi Dr. Szlajen has published and lectured widely in various languages, congresses and symposia, achieving awards, distinctions and national & international grants for his research works and its contribution from a Jewish perspective to the current general problems. The fundamental aim of his work is to help build from Judaism a human being with more dignity, a society with more justice, and therefore a better world for all of us.
- For all the above, Rabbi Dr. Szlajen is currently regarded as one of the most important authorities in the aforementioned area of his competence.