Maxwell GeoSystems has successfully commissioned the Shaft and Tunnel Excavation Monitoring System (STEMS) for the DTSS2 Project in Singapore.The project will construct about 60 km of link sewers and 40 km of deep tunnels in the south western part of Singapore as well as the Tuas Water Reclamation Plant in deep retained excavation. The STEMS, based on Maxwell GeoSystems’ successful MissionOS platform, is being used by all parties and will provide a unified resource for effective management and communication of data on the project covering investigation, risk, design, instrumentation and production data. Both shaft and tunnel components were commissioned within the 7 month period provided by the client, PUB, Singapore’s National Water Agency.Following the successful completion of the Singapore Powergrid tunnel and the KVMRT phase 1, MissionOS has been redesigned as a completely configurable data system aimed at infrastructure development and ongoing maintenance management.The STEMS implementation has made great use of this configurability to shorten the implementation time and limit the need for additional code development.