On 24 April 1892, Kadavil Paulose Mar Athanasios ordained him as deacon and on 24 November and 27 November 1898 he was ordained as priest and Ramban respectively by Parumala Mar Gregorios.[1] He resided in Kundara church and took charge of the southern dioceses of the Malankara Orthodox Syrian Church. He also served as Manager and Malpan of the Old Seminary. His published books included "Sahaden marude Charithram". "Rahasya Prarthanakal". "Parudeesa", and "Mar Yuhanon Mamdana".
When the Association met on 26 December 1934 at M.D. Seminary, Kottayam, he was chosen as Malankara Metropolitan. It was a period when issues within the Malankara Orthodox Syrian Church were becoming very complicated. Through prayer and fasting he received the strength from God to lead his people for many years, inspiring his people to work for their Church and for the glory of God. Following the peace pact of 1958, he had the good fortune to guide the destiny of the unified Malankara Orthodox Church.[2]
Apart from consecrating twelve Metropolitans, and ordaining more than a thousand priests and deacons, he founded and consecrated many churches. As the Catholicos of the East, he officiated in the consecration of Holy Mooron (anointing oil) at the Old Seminary on 22 April 1932 and on 20 April 1951. On 2 November 1947 he declared Parumala Mar Gregorios and Catholicos Eldho Mor Baselios as saints.[1]
From his time onwards the offices of Catholicos and Malankara Metropolitan were united in one and the same person. Baselius Geevarghese II died on 3 January 1964 at Develokam Aramana and was laid to rest beside the Devalokam Aramana Chapel. Every year the Church observes his feast on 3 January.