Cardew and Dowsett will report to Alistair Green, head of strategy in Mindshare’s business planning department. They will provide senior support to a strategy team of 10.
Dowsett most recently worked as head of media, brand and digital planning at News International.
She will be responsible for further developing the communication strategy for Diesel and TK Maxx, as well as a number of Nestlé brands.
Cardew joins from Naked, where he held the role of senior strategist leading accounts such as Foster’s, Discovery Channel and Sony Europe.
At Mindshare, Cardew will be responsible for developing the communication strategy for Land Rover, Jaguar and ITV.
Green said: "I’ve been trying to build a team of strategists who can integrate deep understanding of our client’s business, brand and consumers.
"Chris and Caroline are two of a very rare breed who can fulfil all of these requirements and I’m thrilled to have them both onboard."