Member of the Salesian Congregation, he has a Degree in Theology from the University of Würzburg, Germany. He is Dean of the Faculty of Theology of Benediktbeuern (Germany).
He has studied New Testament exegesis under the guidance of E. Schanckenburg with whom he wrote his qualifying thesis. He has collaborated in numerous publications. His most significant books are Der erste Clemensbrief, übersetzt und erklärt, (Vandenhoeck & Ruprecht Göttingen, 1998) and Die 'Wahre Lehre' des Kelsos, übersetzt und erklärt (Herder, Freiburg, 2005).