From 1996-1997 he studied at the Theological School of St. John the Damascene in Balamand, Lebanon, where he improved his knowledge of the Arabic language. In 2001, he presented a doctoral dissertation at the Theological School of the Aristotle University of Thessaloniki under the title: "Severus of Antioch and the Council of Chalcedon" proclaiming him a Doctor of Theology. In 2004, he was invited to Holy Cross Greek Orthodox School of Theology in Boston, where he taught as a visiting professor for one semester.
In March 2005, at the proposal of His All Holiness Ecumenical Patriarch Bartholomew, he was promoted by the Holy and Sacred Synod to the position of Chief Secretary and was ordained to the priesthood by the Ecumenical Patriarch in the Patriarchal Cathedral. In 2009, he submitted two dissertations to the Theological School of Thessaloniki and was unanimously elected Assistant Professor of Symbolics, Inter-Orthodox Relations and the Ecumenical Movement. The dissertations are entitled: "The Synaxis's of the Hierarchy of the Ecumenical Throne (1951-2004)" and "Luther's Ninety-five Thesis. Historical and Theological aspects. Text - Translation - Commentary ".
In March 2011, he was elected Metropolitan of Bursa and in August of the same year was appointed Abbot of the Holy Patriarchal and Stavropegial Monastery of the Holy Trinity on the island of Chalki. He has served as the Orthodox Secretary of the Joint International Commission for the Theological Dialogue between the Orthodox Church and the Lutheran World Federation and as a member of the Patriarchal delegations to the General Assemblies of the Conference of European Churches and the World Council of Churches. He was the Secretary of the Pan-Orthodox Synods in Sofia (1998), Istanbul (2005), Geneva (2006), and Istanbul (2008). He has been a member of the Faith and Order Commission of the World Council of Churches since 1996.