•PT. TONSCO INTERNATIONAL established on 2004 in Jakarta , Indonesia.•At the beginning of the PT. TONSCO INTERNATIONAL is a company for Pre commissioning services , but with the passing of time, PT. TONSCO INTERNATIONAL to develop for EPCI activity.•Typically PT. TONSCO INTERNATIONAL range activities of taking overall responsibility for :• EPCI• ( Fabrication , Maintenance, Installation )• Services• ( Pre commissioning, Diving, Hot Tapping, Cold Cutting, welding Habitat, Tightening & tensioning, Sub sea tensioning )• Rentals• ( Welding Machine, Compressor, Iso Tank, Evaporator , Heavy Equipment )•The experience list and photographs illustrating the diversity of PT. TONSCO INTERNATIONAL operations are described in detail in these company profile.•Recently the company has been very active in the oil & gas, petrochemical and power industries.•We would welcome the opportunity to discuss in detail how PT. TONSCO INTERNATIONAL can serve you.