The agency already works on Tesco Clubcard in the UK and Ireland, and will now work with Tesco to launch or develop existing schemes in nine countries -- Thailand, Malaysia, Hungary, South Korea, Turkey, China, Slovakia, the Czech Republic and Poland.
Tesco runs the Clubcard scheme as: Familycard in Korea, which already has 3.8m members; Membercard in China, with 3m members; and Clubcard/Business Clubcard in Malaysia, where more than a million have signed up.
It also has trial schemes operating in Thailand and Turkey and Tesco is looking at starting trials in Poland and Slovakia.
As well as working with Tesco, Dunnhumby will deal with Tesco's suppliers in the nine regions, giving them access to the customer insight, media and direct-to-customer communication services to help them to better understand the who, how and why behind how their products are purchased.
This insight helps both store and supplier become more customer-centric by improving understanding of shoppers.
Philip Clarke, Tesco International director, said: "With more than half of Tesco's retail space now overseas we want to make sure that as many customers as possible enjoy the great benefits that Clubcard brings.
"Our partner Dunnhumby is a recognised world leader in providing the type of customer insight and targeting/personalisation that we need and we're thrilled to be working together on this project."