No financial details were disclosed.
Thames Water, which is the UK's largest water and waste water services provider, serves 15 million customers in London and the Thames Valley region.
Wipro is working in partnership with EY to support the business change and readiness aspect of this transformation programme.
As part of the contract, Wipro will be developing new IT systems and processes to help Thames Water improve customer experience and drive operational efficiencies, the Indian firm said in a statement.
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From April 2017, 1.2 million business/non-household customers in the UK will have the right to choose their water supplier, making it the largest retail water market in the world.
Wipro will help Thames Water implement SAP industry solution for utilities billing along with a new market integration gateway and a cloud-based customer relationship management (CRM) platform.
This programme will replace a 20-year old legacy billing platform and is designed to help simplify customer experience and introduce greater flexibility for Thames Water.
In a separate statement, Wipro said it has implemented its software as a service platform -- Managed File Transfer as a Service (MFTaaS) -- on Amazon Web Sevices (AWS) for organisations, thereby helping them integrate digitally with their clients, partners and employees.
Wipro anticipates the MFTAaaS platform can potentially reduce up to 30 per cent in total cost of ownership (TCO) for its clients vis-a-vis traditional deployments, it added.