Jean has served as the Director of Centre Jean XXIII - Grand Séminaire since 2013. In 2015, he founded the Luxembourg School of Religion and Society, forming cooperations with many outstanding institutions of higher education and research. He has taught as several universities in France, Germany, Italy and at Sacred Heart University. In the Archdiocese of Luxembourg, he is a Canon of the Cathedral and serves as the Episcopal Vicar for Academic Affairs. He is also a member of the Institut Grand-Ducal. Jean has two Ph.D. degrees in philosophy and theology, as well as in French and comparative literature.