[2] In the course of his study of Slavistics, he became a specialist in a number of Slavic languages and literature, including Russian, Serbo-Croatian, Slovak, Czech and Macedonian.
While studying under Professor Dmitri Chizhevsky at the University of Heidelberg, he visited the ROCOR Church of St. Alexander Nevsky in Mannheim.
In Belgrade, Michael became part of a tightly-knit group of Serbia elder's students through an archimandrite, St. Justin (Popović): hieromonks Amfilohije Radović, Atanasije (Jevtić), Artemije (Radosavljević) and Irinej (Bulović), now bishops of the Serbian Orthodox Church.
In April 1986 he was appointed Ruling Bishop of the Diocese of Great Britain and Ireland and Rector of St. Alexander Nevsky Church in Copenhagen.
Archbishop Mark has been one of the most ardent supporters of Church unity between ROCOR and the Moscow Patriarchate, and worked tirelessly to see this goal achieved.
[4] 8 December 2016 the Synod ща ROCOR heard the report by Archbishop Mark and then accepted his resignation from the Diocese of Great Britain[5] On 10 December 2019, the feast day of the Kursk-Root Icon of the Mother of God, Archbishop Mark was made a Metropolitan by the Holy Synod of ROCOR in recognition of his 40 years of Episcopal service to the Church.