Dr Petros Vassiliadis, emeritus professor of the Aristotle University of Thessaloniki, and director of the Inter-Orthodox Post-Graduate Program on "Orthodox Ecumenical Theology of IHU”, is the President of the Center for Ecumenical, Missiological and Environmental Studies “Metropolitan Panteleimon Papageorgiou” (CEMES), a former Orthodox commissioner of WCC’s Commission on World Mission and Evangelism (1998-2006), and the President of World Conference of Associations of Theological Institutions/Educators (WOCATI).