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St. Theresa Industries has been accredited with ISO 9001:2008 certification with Sri Lanka Standard Institution (SLSI).
33kv two section Pole Grantry Constructed and completed by STI at Nawalapitiya Cho...
STI Kenya was able to strive through during most challenging years of human history
The construction of 33kV Distribution line from Elpitiya to Mattaka.
The opening ceremony of the Aselapura – Mahaweli Authority Project construct...
The opening ceremony of the Handicap International building constructed and comple...
The construction of 33kV Distribution line from Kegalle to Gevilipitiya.
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