Professor of History Kyiv National University of Taras Shevchenko

Villanova University

Professor of African Christianity and Pentecostal studies, University of Ghana

Professor of Medieval History, Florida Gulf Coast University

Emeritus Professor, Universidade Lusófona. Editor, "Fluxos & Riscos".

Professor of Church History and Church Polity

Professor of Patristics and Church History, University of Salzburg

Professor of Systematic Theology, Stellenbosch University

Lecturer in Biblical Studies and Church History, Ming Hua Theological College

Aalborg University