His Grace was born on 15th June 1956 as the son of Mr. T. V. Mathai and Mrs. Aleyamma Mathai of Thekkil Kandathil family in Valanjavattom, Thiruvalla and a member of St Mary’s Orthodox Church, Valanjavattom in Niranam Diocese. Mar Dionysius became a member of Mount Tabor Ashram on 15th July 1971. He stood first in the Master’s Degree Exam of Madras University and won the “Chithanass" award and the gold medal in 1981. His Grace took the M. Phil, Ph. D. Degrees from the University of Kerala and his B.D. degree from the University of Serampore. His Grace was ordained deacon in July 1980. He was ordained as a priest on 4th December 1985. He got Certificate in Advanced Christian Leadership Studies from the Haggai International Institute, Singapore in 2006, Honorary D-Lit Conferred by University of South America in 2017. His Grace took his M.Th. in Missiology from Faith Theological Seminary, recognized by Higher Education Department Govt. of Nagaland in 2019. His Grace served as the Metropolitan of Calcutta Diocese from 2009 to 2022, and also served as the Director of St. Thomas Mission Bilai. His Grace also served as the Asst. Metropolitan of Delhi Diocese from 2009 – 2010. His Grace had been teaching in the Dept. of Zoology at St Stephen’s College Pathanapuram. From 2000, His Grace had been the director of the research department of Zoology. His Grace won the “Man of the year" award from American Biographical Institute in 2003 and St Berchman’s award for the Best University Teacher in 2008. His Grace is ever active as a guide and mentor in meditation, preacher, researcher and ecological theologian. H.G. is the visiting faculty of St. Thomas Orthodox Theological Seminary Nagpur. H.G. currently serves as the President of Orthodox Syrian Sunday School Association of the East, President of Akhila Malankara Balasamajam and President of Ecological Commission.

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