He has been teaching dogmatic theology and liturgical science for more than two decades now at the Faculty of Theology at the University of Freiburg. In addition to that, he works as a professor of dogmatic theology at the University of Lucerne, as well as a guest lecturer at Boston College. From 2006 to 2014, he served as the theological advisor of the Liturgical Commission of the German Bishops' Conference. He is a father of two and has been a permanent deacon since 1995. He started his university studies in Münster, where he read philosophy and theology. Later, he worked at the Faculty of Catholic Theology of the Eberhard Karls University of Tübingen, parallel to which graduated from doctoral school summa cum laude.