Zwillenberg (pictured), who officially joins Kantar on 29^th September, will be based in the US and was previously vice-chair of reinvention and global leader of media and entertainment strategy at Accenture.

Prior to Accenture, Zwillenberg was chief executive at the Daily Mail and General Trust PLC, with the company being taken private in 2022. Before that, Zwillenberg was senior partner and managing director at BCG, leading its global media practice.   

Jansen had led Kantar Group since July 2021 and the standalone Kantar business since January 2024, and will lead the Kantar business through to the end of 2025 as part of the transition to new leadership.

Jansen will also leave his role at Kantar Group by the end of the first quarter of 2026 and step down from the organisation.

Adam Crozier, chairman at Kantar Group, said: “I would first like to thank Chris for his outstanding leadership in the significant transformation of Kantar. Today, it is a fundamentally better and healthier business than the one he inherited four years ago.

“In Paul we have found the right inspirational leader for Kantar’s next phase, to deliver even more value to our clients and grow the Kantar business. I am enormously optimistic for the future of the business under Paul’s vision and leadership.”   

Jansen added: “With the roadmap for Kantar well established, and the operational separation of Numerator nearing completion, now is the right time to introduce a new dedicated leader for Kantar.

“In Paul, we have a brilliant new leader with a world-class reputation for digital innovation, operational leadership, and client-centric, long-term growth.”