Gladdis (pictured), who joined MediaCom in 1994, has been UK chief strategy officer for the past three years. In his new role, he will further develop the agency’s planning capability and culture across its offices in Europe, the Middle East and Africa.

Josh Krichefski, chief executive, MediaCom EMEA said: "Steve has played a huge role in building MediaCom UK into the industry leader that it is today. From ensuring there’s a strong planning culture, an understanding of what great planning work looks like, and bringing a collective excitement about the possibilities to every brief, he has guided hundreds of media planners at MediaCom."

As UK head of strategy since 2015, de Burca has led the company’s team of strategists and its social change hub – a network of clients and media experts focusing on behaviour change principles.

Krichefski added: "Geoff is one of the people who has benefitted from Steve’s tenure and I’m excited to see Geoff grow further in his new role as UK chief strategy officer. He’s been a key member of our strategy team for the past 10 years and has brought an incredible passion for the job."