St. Thomas Mission Orthodox Church Mission, Bhilai is one of the pioneer organisations working for the wholistic development of all persons, irrespective of race, caste or creed. St. Thomas Mission is the official Socio-Developmental wing of the Bhilai Mission, the Outside Kerala Mission of the Malankara Orthodox Church for Social Action, Relief and Development. It is a registered body under the Societies Registration Act (Chattisgarh) XXVI of 1961 with registration No. 8400 of 1979 and having its registered office at St.Thomas Mission Centre, Kailash Nagar, Industrial Estate, Bhilai, 490001, District Durg, Chattis Garh, India. The St.Thomas Orthodox Syrian Church Mission Bhilai was founded by the Late lamented H.H.Baselios Mar Thoma Mathews I, the then Catholicos of the East and the Malankara Metropolitan of the Orthodox Church of India in the year 1972.The first Director and President of the Mission was Late Lamented H.G. Dr.Stephanos Mar Theodosius Metropolitan.
The present President/ Director is H. G. Dr Joseph Mar Dionysius Metropolitan.