Spyridon K. Tsitsigkos is a Full Professor of the Psychology of Religion at the School of Theology of the National and Kapodistrian University of Athens (Greece). He holds doctoral degrees in both Theology and Psychology and specializes in the Psychology of Religion. His principal research interests encompass Existential Psychology, Depth Psychology, Developmental Psychology, Cognitive Psychology, and the interdisciplinary study of religion and the human psyche.

Professor Tsitsigkos was born in 1959 in Chalkida (Greece), where he completed his formal education. Alongside his general education, he pursued systematic studies in Byzantine and European instrumental music, as well as in the visual arts.

He studied at the School of Theology of the National and Kapodistrian University of Athens and at the Faculty of Philosophy, University of Crete. Through a scholarship awarded under the European ERASMUS programme, he continued his postgraduate education in the United Kingdom, where he obtained a Master's degree from the University of Durham.

Throughout his academic and professional career, he has undertaken extensive additional training in educational, pedagogical, pastoral, psychological, and social engagement. His professional development has included participation in specialized programmes in mental health and Clinical Psychiatry, among them a programme at the Community Mental Health Center in 1993, the Clinical Psychiatry Programme of the University of Athens in 2000, and the Clinical Psychiatry Programme of the University of Athens, conducted in collaboration with the Institute of Psychiatry at King's College London, in 2005.

His academic career at the School of Theology of the National and Kapodistrian University of Athens has developed progressively over the past two decades. He was elected Lecturer in 2004, Associate Professor in 2008, and Full Professor in 2019, with a specialization in the Psychology of Religion.

In addition to his university teaching, Professor Tsitsigkos has taught Psychology and a range of theological subjects at the Higher Ecclesiastical Academy of Athens, vocational education and training institutions, military schools and academies, parent education programmes, and other educational institutions. He has also taught Counseling Psychology, Cultural Anthropology, and the Psychology of Culture within adult and continuing education programmes. Furthermore, following officially certified training in Computer Science in 1997, he has also taught computer-related subjects in educational and vocational training settings.

Professor Tsitsigkos has an extensive record of participation in academic, educational, and professional activities. He has served as a lecturer and speaker at numerous national and international conferences, workshops, postgraduate programmes, continuing education courses, and refresher programmes in the fields of Psychology, Theology, Philosophy, Pastoral Studies, and Religious Studies. He has also contributed to educational and professional programmes organized by the Holy Synod of the Church of Greece.

His scholarly and public engagement extends beyond the University. He has participated in numerous radio and television programmes and has delivered lectures and invited presentations on scientific, cultural, educational, pedagogical, social, and religious topics. His lectures have been hosted by municipalities, professional and cultural organizations, intellectual and cultural centers, senior citizens' organizations, churches, schools, parents' associations, and other public and private institutions.

A significant part of his academic and public work has focused on issues of particular relevance to contemporary society, including mental health, family relationships, youth, identity formation and identity crises, existential concerns, spirituality, religious experience, and the role of faith in the life of contemporary human beings.

Professor Tsitsigkos is the Founder and President of the Greek Association for the Psychology of Religion. He is also a member of numerous Greek and international scientific and professional organizations, including the American Psychological Association (APA), the International Association of Applied Psychology (IAAP), the International Association for the Psychology of Religion (IAPR), the Association Internationale d'Études Médico-Psychologiques et Religieuses, the Greek Psychological Society, and the Religious Research Association, among others.

He has also served as a member of the governing board of the Panhellenic Union of Theologians and has maintained an active presence in national and international scholarly networks. His international academic activities have included his appointment as a Visiting Professor at the Faculty of Theology of Valahia University in Târgoviște, Romania.

Professor Tsitsigkos has played an active role in academic publishing and scholarly communication. He directs two academic journals: the English-language journal Theophany, associated with the National and Kapodistrian University of Athens, and New Zion, published by the Patriarchate of Jerusalem. He has also served on the editorial boards of Greek and international scholarly journals, including Socrates, Koinonia, and Diadromē. In addition, he has served as a peer reviewer of scholarly manuscripts submitted for publication in academic journals.

His scholarly output includes more than 22 books and monographs, together with a substantial body of scholarly articles, essays, encyclopedia entries, and other scholarly contributions published in Greek and international journals, encyclopedias, periodicals, and collective academic volumes. These contributions include his work as an editor of Religiosity and Psychopathology (Beijing, 2026), as well as his contribution to The Cambridge Handbook of the International Psychology of Religion (2026), in his capacity as Greece’s representative. His scholarly work reflects an interdisciplinary approach integrating Psychology, Theology, Philosophy, and the study of religion.

In recognition of his academic, cultural, educational, and social contributions, Professor Tsitsigkos has received numerous distinctions and awards from Greek and international institutions. Among the institutions and organizations that have honored his scholarly and cultural work are the Ministry of National Education and Religious Affairs of Greece, the Pan-European Report, the Frankfurt Book Competition, in collaboration with the National Book Centre of Greece, the Patristic and Byzantine Institute of America, the Prefecture of Piraeus, the Piraeus Intellectual Center “Philo,” the “Goddess Athena” Academy of Letters and Arts, and the International Union of Greek Men of Letters, where he has served as Second Vice-President. He was also honored by the National and Kapodistrian University of Athens in recognition of his outstanding contributions to the University and to society (2024–2025).

Overall, Professor Tsitsigkos's academic career is characterized by an interdisciplinary engagement with Theology and Psychology and by a sustained commitment to the study of religion in relation to human development, existential experience, mental life, and contemporary society. Alongside his university teaching and scholarly research, he has maintained a substantial public, educational, and cultural presence in Greece and abroad.