Archbishop Mar George Valiamattam was born on 16th September 1938 at Punnathara in the Archdiocese of Changanassery as the eldest son of Thomas and Annamma Valiamattam. Later, his family migrated to Kodancherry in Calicut District. He had his school education at Nariveli and Punnathara. After his minor seminary formation in st. Mary's Thop Minor seminary, Thrissur, he joined Carmelgiri seminary, Aluva for Philosophical studies. His theological studies were done at the Urban University, Rome. He was ordained priest by Mar Sebastian Valloppilly on 30th November 1963 in Rome. After his ordination he obtained his doctoral degree in theology from the Gregorian University, Rome in 1967.

           He served the diocese as assistant vicar of St. Mary's Church, Kodancherry, Vicar of St. Mary's Church, Thalanji, and Secretary to the Bishop, Chancellor of the diocese, Diocesan Director of Catechism and Mission League and as Rector of the Minor Seminary. He served in the diocese of Thamarassery in the capacity of chancellor, secretary and Director of Catechism. When nominated the second Bishop of Tellicherry, he was the Forane Vicar at St. Thomas Forane Church, Shirady.

           He was consecrated Bishop at St. Joseph's Cathedral Tellicherry by His Eminence Antony Cardinal Padiyara, assisted by Mar Joseph Powathil, Archbishop of Changanassery and Mar Sebastian Valloppilly, on May 1st, 1989 and assumed office on the same day.

           When the diocese of Tellicherry was raised to the status of Metropolitan Archdiocese, he was promoted and appointed as its first Metropolitan Archbishop on 18th May, 1995. He was enthroned as the Archbishop on July 24th 1995, at a solemn ceremony in St. Joseph's Cathedral presided over by the Major Archbishop His Eminence Antony Cardinal Padiyara.

           At present, he serves also as the member of the standing committee of the Catholic Bishop's Conference of India (CBCI). He is a member of the Permanent Synod of the Syro-Malabar Major Archiepiscopal Church and of many other synodal commissions. He is also the Chairman of the synodal commission for the Good Shepherd Major Seminary, Kunnoth, Keala, India.