Bishop Bosco was born on 28 May 1946 at Parappur, in the archdiocese of Trichur, Kerala. He hails from a deeply religious Catholic family and a well-knit Syro Malabar community. His openness to his family’s religious values and involvement in the parish church was instrumental in discerning his vocation towards Priesthood. After his school studies, he joined the minor seminary of the archdiocese (1962-64), and the major seminary at Alwaye in 1964. But after a year he was chosen to be sent to Rome for completing his studies in philosophy and theology at the Pontifical Urban University (1965-71). He was ordained a priest on 27 March 1971 in Rome. Then he proceeded to the Catholic University of Louvain, Belgium, to pursue higher studies in theology, which he successfully completed in 1975 by defending his doctoral thesis in the department of dogmatic theology writing a dissertation on the “Theology of Hope”. He has the educational qualifications of L.Ph; Licentiate in Sacred Theology (S.T.L); Doctorate in Sacred Theology (S.T.D.)
He began his pastoral ministry as an assistant parish priest in Ollur, one of the largest parishes of the archdiocese (1976), and then he moved to the minor seminary as the prefect of studies (1976-77). Soon he was asked to teach theology in St. Joseph Pontifical Seminary, the major seminary at Alwaye (1977-92) where he served as a formator of the seminarians, a teacher, Librarian, Dean of theology and Vice-President of the Pontifical Institute. As a professor of theology, he taught various subjects such as Christology, Ecclesiology, Pastoral theology, etc. In 1992 he was called back to his archdiocese to take up a series of important assignments such as the minor seminary Rector (1992-95), Vicar General (1995-99) and parish priest of the cathedral church (1999).
His tenure as the parish priest was too short as his service was urgently requested at the Syro-Malabar Major Archiepiscopal Curia as the Executive Director of the Liturgical Research Centre. The Centre was instituted by the Synod of the Syro-Malabar Bishops at a critical time in the history of the Syro-Malabar Church. Fr Bosco Puthur led the Research Centre from 1999 to 2005 till he was appointed the Rector of the St. Joseph Pontifical Major Seminary of Mangalapuzha, Alwaye (2005-2010). St. Joseph Seminary is one of the largest seminaries in the Catholic world with about 300 seminarians.
As he was terminating his service in the seminary, he was appointed the first Curia Bishop of the Syro-Malabar Church in 2010. As the Curia Bishop and Secretary of the Synod of Bishops he did a great service to the Church. Bishop Bosco was the Administrator of the Syro-Malabar Church during the interim period after the demise of the Major Archbishop Varkey Cardinal Vithayathil CSsR.
On 23 December 2013 Pope Francis established the Eparchy of St. Thomas the Apostle of Melbourne of the Syro-Malabars (Australia), appointing as its first Eparchial Bishop Bosco Puthur and the news was officially announced on 11 January 2014. The inauguration of the Eparchy and the installation of Bishop Bosco Puthur took place on 25 March 2015 in Melbourne. Bishop Bosco Puthur is also appointed as the Apostolic Visitor to the Syro-Malabar faithful in New Zealand.