Kommission für Glauben und Kirchenverfassung
He speaks with church leaders like Pope Benedict XVI, Pope Francis, and the Ecumenical Patriarch Bartholomew I and gives lectures all around the world. He is also consultant of the Faith and Order Commission, the Theological Commission of the World Council of Churches, Chair of the Board of Advisors of the Central Council of Oriental Christians in Germany (ZOCD), and Member of the International Committee of the Global Christian Forum.