Mandya district, a part of the diocese of Mananthavady was entrusted to the MST for the missionary apostolate in 1978 by His Excellency Mar Jacob Thoomkuzhy, the then bishop of Mananthavady. The mission work was formally started on 22 September 1978 with a formal agreement between the bishop and the superiors of the Society. When Mission was entrusted to the MST there was no house or any infrastrecture. To start with missionries stayed in a rented house. It was in 1980 missionaries got shifted to own house built in Kalehanahally.In 1981 a second mission station was opened in Guthalu near Mandya. Within 32 years MST missionaries developed 21 mission stations. Mandya mission took the policy of not having big institutions but going out to the villages and start developmental programmes. Therefore missionaries started non formal education centers, SHGs etc. for the development of the villages. On 18th January 2010 Mandya diocese was erected comprising districts of Mandya, Hassen, Mysore and Chamarajnagar. Once the diocese was erected MST handed over 12 out of 21 mission stations to the diocese.
In 2008 Mandya region was renamed St Thomas Region and its area was extended to the syro Malabar eparchies in Karnataka, Tamil Nadu and Andhrapradesh.
MST Mandya region has taken up mission in Adilabad diocese in Andra pradesh comprising of Boath and Nyeredigunda mandals.
In 2013, a new MST centre was started in Sathyamangalam in the diocese of Ramanathapuram, TN.
MST CENTRES OF APOSTOLATE & INSTITUTIONS
Stations entrusted to the diocese
|Kalehanahalli||Church, Health centre|
|Guthalu||School, Childrens Home|
|Cheekanahalli||School, tailoring centre|
|Hosadoddy||Health cente, Tution centre|
|Nagmangala||V Guard stabilizer production Unit|
|Sikkaripura||School, tailoring centre|
|Ashakirana||Hiv/AIDS care centre|