Williams (pictured) has 15 years’ marketing experience both agency and client side and joins from digital marketing agency, iCrossing, where he spent eight years, latterly as head of search.

He will report to iProspect’s director of performance media products, Caroline Reynolds, when she returns to the business later this year. In the interim, he’ll report into chief strategy officer, Emil Bielski.

Bielski said: “Mark brings a wealth of experience in digital marketing and product strategy. He will drive forward our ambition of delivering transformative performance solutions through ever deeper specialist capabilities.”