The Right Reverend K. Reuben Mark is the present (2015 onwards) Bishop in Karimnagar and the sixth in succession and occupies the Cathedra of the Bishop placed in Karimnagar's CSI-Wesley Cathedral. Reuben Mark is currently a Council Member for the period 2015-2018 at the fully-ecumenical United Theological College, Bangalore. During the XXXVIth session of Church of South India Synod, Reuben Mark has been elected as Deputy Moderator for the triennium 2020-2023 succeeding V. Prasada Rao.
Before he assumed the ecclesiastical office of the Bishop, Reuben Mark was Professor in Homiletics from 1995 through 2015.[5][6] Mark's professorship was at the Andhra Christian Theological College, affiliated to India's first University, the Senate of Serampore College (University) {a University under Section 2 (f) of the University Grants Commission Act, 1956}[7] with degree-granting authority validated by a Danish Charter and ratified by the Government of West Bengal.
After his Seminary studies, Reuben Mark was ordained as a Deacon in 1988 by then Bishop K. E. Swamidass, CSI and the following year as a Presbyter at the CSI-Wesley Cathedral in Karimnagar and began pastoring parishes within the ecclesiastical jurisdiction of the Diocese of Karimnagar until 1992 when he went to upgrade his academics in the Protestant Seminary in Bangalore. After his return from the Seminary in 1994, Reuben Mark began re-pastoring the parishes until 1995 when Bishop S. John Theodore, CSI sent him for teaching ministry to the Protestant Regional Seminary in Secunderabad.