John Meyendorff

Meyendorff was born in Neuilly-sur-Seine, France, into the émigré Russian nobility as Johannes Freiherr (Ivan Vasilyevich) von Meyendorff. In France, Meyendorff was an Assistant Professor of Church History at the St. Sergius Institute, and a Fellow at the Centre National de la Recherche Scientifique.

After his ordination to the priesthood in the Orthodox Church in 1959, Meyendorff and his family moved to the United States. There he joined the faculty of Saint Vladimir's Seminary, located in Tuckahoe, New York, as a Professor of Church History and Patristics. Additionally, he held successive joint appointments as a lecturer in Byzantine theology at Harvard University, Dumbarton Oaks (to which he returned for a semester as Acting Director of Studies in 1977), and as Professor of Byzantine History at Fordham University (from 1967). He also was Adjunct Professor at Columbia University and Union Theological Seminary, both in New York City, and lectured widely on university campuses and at church events. He held the position of Dean of St. Vladimir's Seminary from March 1984 until June 1992.
Source: https://en.wikipedia.org/wiki/John_Meyendorff