Robert Horler promoted to CEO of Dentsu Aegis USA

The newly created role will see Horler develop, drive and execute the network's strategy from April when he will relocate to New York.

He will also become a global executive of the network and retain his responsibility for the global development of the iProspect and Data2Decisions brands.

Morris explained: “In the global context, the US economy continues to show its strength, resilience and innovation, with its advertising spend now exceeding its 2007 pre-recession peak.

"For Dentsu Aegis Network, the US has been a great success over the last five years and it will be a key driver of our future growth. With the significant momentum we have in the market, as a group and across all our agencies, by having a dedicated chief executive we will take the business to the next level," he added.

Horler commented: “It is with great pride and excitement that I take up the role of chief executive officer of Dentsu Aegis Network, USA, to lead our business in the most dynamic market in the world. Supported by Nigel and the US leadership team, many of whom I know well, I am confident that we will build on the considerable momentum that has fuelled our success to date, strengthening the network and brands for the benefit of our clients.”

Thierry Jadot, chief executive for the company in France, will also take in responsibility for the Netherlands joining an existing cluster of the network in France, Belgium and MENA, while UK chief executive, Tracy de Groose will also be responsible for Ireland. She will also join the EMEA executive board.