In short, some major events in the history of this Parish are
1. First visit of HG Dr Paulose Mar Gregorios 1977
2. Appointment of Rev Fr P K Thomas as the First Vicar. The Formal beginning of this Parish. 1978
3. Registration of St Thomas Orthodox Church Society 1980
4. Purchase of Plot at Lajpat Nagar for Church Building  
5. Foundation stone laying of Church Building 1984
6. Started an English Medium School 1986
7. Purchase of School Plot 1988
8. Consecration of Church Building by the Catholicos 1992
9. Affiliation of the School to CBSE 1996
10. Purchase of Nursing Home Plot 1999
11. Purchase of Land at Indirapuram for Sr Secondary School 1999
12. Boundary Wall and seven room temporary building 2000
13. Admission for Nursery and Lower Primary Classes 2000
14. Foundation stone laid and work awarded for the Basement, Ground Floor construction of Indirapuram School & shifted the Classes to the New Buidling 2001
15. Work awarded for construction of the Indirapuram School Building 2002
16. Affiliation of Indirapuram School to CBSE 2003
17. Completion of the construction of the School Building 2004
18. Renovation of the Church Building started. 2004
19. Inauguration of School Building at Indirapuram 2005
20. Consecration of the Renovated Church 2005
21. Elevation of St Thomas School, Indirapuram to Senior Secondary 2006
22. Obtained Minority Status for both Institutions 2006
23. Adoption of Kaushallya Village for its integrated Development 2006
24. Conducted Priest Conference of 4 Outside Kerala Diocese 2007
25. Purchased 13.5 Acres of Land in Yamuna Expressway in Tapal Tehsil District Aligarh for further expansion purpose 2007
26. . Conducted Global Meet of Akhila Malankara Martha Mariyam Samajam With an attendance of approx,. 3000 ladies from various parts of the Globe 2009
27. Purchased an Independent Residential Building, F–27 at Lajpat Nagar 2010
28. Consecration of Catholicate Centenary Building (Nursing Home) 2012
29. A plot admeasuring 5025 Sqm was alloted by GDA for Senior Secondary School at Indraprastha Yojna, Loni Road Ghaziabad. 2013
30. A plot admeasuring1100 sq. meter was allotted by GDA for primary School at Indraprastha Yojna, Loni Road, Ghaziabad. 2013
31. First Assistant Vicar of the Church joined. 2014
32. Swara Raaga Sandhya to raise fund for charity projects held at Talkatora Indoor Stadium 2015
33. Blessing of new building in F–27, Lagpat Nagar 2015
34. HOPE School started at St. Thomas School, Indirapuram 2015
35. St. Thomas Clinic Sahibabad inaugurated by H.G. Dr. Abraham Mar Seraphim, Metropolitan of Bangalore Diocese 2015
36. . Foundation Stone laying ceremony of the Primary school , Loni conducted by H.G. Youhanon Mar Demetrios 2016
37. Renovation of St. Thomas School, Sahibabad alongwith construction of an additional floor 2016
38. Foundation stone laying cermony of Auditorium at St. Thomas School, Indirapuram conducted by H. G. Youhanon Mar Demetrios 2016
39. Purchase of New plot at F–39, Lajpat Nagar 2016
40. Primary School Building construction started at Indraprastha Yojana Project, Loni 2016
41. Pearl Jubilee celebration of St. Thomas school, Sahibabad; 30 girls helped under the scheme of 'Beti Bachao Beti Padhao' 2016
42. Construction work started at Senior Secondary School at Indraprastha Yojna, Loni. 2017
43. Work started for Auditorium at St. Thomas School, Indirapuram 2018