What sets dunnhumby apart
dunnhumby's customer science underpins Tesco Media, the retail-media business built on Tesco Clubcard data, which as of the 2026 We Know the Nation report covers more than 24 million UK households and over 80% of Tesco's UK sales.
That data feeds Sphere, the self-serve platform dunnhumby built for Tesco Media's advertisers to plan, run, and measure campaigns against real shopping behaviour rather than survey panels. A graduate or intern role here sits inside applied data science built around one specific, very large first-party retail dataset – closer to an in-house analytics team married to a live commercial media business than a generalist consultancy assignment, which is worth weighing for a candidate who wants retail-and-loyalty-data depth over sector breadth.