Arch Bishop Most Rev. Isaac Mar Clemmees was consecrated as the second Major Archbishop of the Trivandrum Arch Diocese and Prelate of the Malankara Catholic Church on Monday, March 5, 2007 in St. Mary's Cathedral at Pattom, Trivandrum. The ordination function was in the presence of the dignitaries inclusive of Apostolic Nuncio Archbishop Pedro Lopez Quintana, CBCI President Cardinal Telesphore Toppo, CCBI President Archbishop Oswald Gracis and Major Archbishop of Syro-Malabar Church Cardinal Varkey Vithayathil. The ecclesiastical name conferred to the Major Arch Bishop is Baselios Clemmees. The new prelate of the Church is of 48 years and he is the youngest to occupy the highest office of the Church since its inception.

Mar Clemmees was elected to lead the Church by the Syro-Malankara Bishops' Synod held on Feb. 7, 2007 after the departure of Major Archbishop Most Rev. Cyril Mar Basalios for his heavenly abode. H.H. Pope Bendict XVI later confirmed his election.

Mar Clemmees is born on 15 June 1959 in the Mallappally Kunnanthanam Mukkoor Thottungal family to Mathew and Annamma couple. He was ordained as priest on June 11, 1986. While Fr. Isaac was serving as the Vicar General of Bethery Diocese, he was elected to His episcopate. He was ordained as Bishop on August 15, 2001 and appointed as the Assistant Bishop of Arch Diocese of Trivandrum and the Apostolic visitor to United States of America. In 2003, he was installed as the Bishop of the Diocese of Tiruvalla.

At the instance of the Episcopal Synod of the Catholic Church, H.H. Pope Benedict elevated the Tiruvalla Diocese of the Syro-Malankara Catholic Church to the status of an Archdiocese. Bishop Issac Mar Clemees was officially ordained as the first Archbishop of this newly formed Archdiocese of Tiruvalla on June 10th 2006. The Major Archbishop Mar Cyril Baselios led the ordination ceremony. Patriarch of Antioc Ignatios Moosa Daveed had extended his felicitation to the new Archbishop Mar Clemmees.

Archbishop Isaac Mar Cleemis was appointed as Vice President of the Catholic Bishops' Conference of India (CBCI) during 2006.

Most Rev. Mar Clemmes is intellectual, a educational visionary, a good writer and an orator. He had done his doctoral studies in the advent of ecumenism. LOL has the honor to carry his message given on the ecumenical meeting of the Maramon Convention 2005.'DO THIS AND YOU WILL LIVE' Thirumeni is comparatively of an young age with a great dynamism to guide and shepherd the Church to its progress. We have great pleasure to congratulate Thirumeni and wish all success in his new appointment. LOL as a whole wish all the best for Thirumeni and pray to God Almighty for all the blessings to Thirumeni from heaven.