Kerslake will fill the newly created role of chief executive of Publicis Dialog, the relationship and sales promotion specialist.
It was Allied Domecq's decision earlier this year to realign its spirits business into Publicis that sent Cordiant's shares into freefall and sparked the chain of events which ended with the group's £266 million sale to WPP.
As a result, 141, which has already lost a number of its senior managers, is being put under the wing of WPP's Ogilvy & Mather.
Grant Duncan, the Publicis chief executive, said Kerslake's hiring reflected the fact that Publicis Dialog had become substantially bigger after Allied Domecq's arrival.
"Publicis Dialog has largely been a direct marketing and new-media specialist, but Allied Domecq will extend it," he said. "In Dennis we'll have someone who understands the totality of the business."
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