STMS has well-equipped modern Science Laboratories, Music Laboratory, Computer Laboratory with 16 new flat screen HP Computers, Bookshop, Arts Room, A Clinic, An Administrative Block, 18 dormitories, Divine-Mercy Garden/Reception, Kiosk/Snacks Shop for relaxation, a Coaster School Bus with a pick-up and truck, a School hall of 500 seating capacity, 2 well mapped football fields,  2 Basketball Courts, a Volleyball Court, a Tennis Court, a Table Tennis Pavillion with 4 Boards, an assembly ground, a Dinning Hall, Modern Water Cistern Toilets and Bathrooms, a good tarred road from the entrance of the gate to the surroundings of the entire school premises, a spacious car park, 9 corporate classrooms for learning with necessary Learning Aids and Projectors, all with white board for clearer and easy learning.