The work of the institute is accompanied by a scientific advisory committee of theologians from Germany and abroad. They support the work of the institute with lectures in courses, articles in scientific publications, expert opinions etc.
The scientific advisory committee meets every spring for three days in Paderborn.
Members of scientific advisory committee have been in the past decades among others: the denominationalism theologian Konrad Algermissen from Hildesheim, the Swiss theologian Hans Urs von Balthasar, fundamental theologian Heinrich Fries from Munich, the founder of the Quarterly “Catholica” Robert Grosche, the Church historian Hubert Jedin from Bonn, fundamental theologian Gottlieb Söhngen from Munich, the reformation historian Joseph Lortz from Mainz, the former professor for dogmatics and later bishop of Mainz Hermann Cardinal Volk. The presidents of the Papal Secretary (later: Council) for Promoting Christian Unity joined the meetings: Johannes Cardinal Willebrands, Edward Idris Cardinal Cassidy, Walter Cardinal Kasper, Kurt Cardinal Koch. From 1959 up to his appointment as archbishop of Munich and Freising, Joseph Ratzinger/Pope Benedict XVI. was a member of the scientific advisory committee.
Current members of the scientific advisory committee are:
Archbishop Hans-Josef Becker
Bishop emeritus Prof. Dr. Paul-Werner Scheele
Prof. Dr. Knut Backhaus, Prof. Dr. Wolfgang Beinert, Prof. Dr. Thomas Bremer, Prof. Dr. Heinrich Döring, Prof. Dr. Dr. Jörg Ernesti, Bischof Dr. Gerhard Feige, Prof. Dr. Josef Freitag, Prof. Dr. Leonhard Hell, Apostolischer Protonotar Dompropst em. Dr. Wilhelm Hentze, Prof. Dr. Wendelin Knoch, Kurt Kardinal Koch, Bischof Karl Kardinal Lehmann, Gerhard Ludwig Kardinal Müller, Erzbischof em. Prof. Dr. Alfons Nossol, Prof. Dr. Heinrich Petri, Prof. Dr. Hermann Josef Pottmeyer, Prof. Dr. Heinrich J.F. Reinhardt, Frau Prof. Dr. Dorothea Sattler, Msgr. Prof. Dr. Peter Schallenberg, Prof. Dr. Hans-Joachim Schulz, Prof. Dr. Thomas Söding, Geistlicher Rat Pfarrer Dr. Michael Ulrich, Stiftspropst Prof. Dr. Franz Georg Untergaßmair, Prof. Dr. Berthold Wald, Prof. Dr. Peter Walter, Prof. Dr. Myriam Wijlens, Prof. Dr. Burkard M. Zapff.