The move is part of a plan to "ramp up" the London office. It is designed to allow the European executive creative director, Paul Banham, more time to focus on his European remit, which includes offices in Amsterdam, Brussels, Dublin, Milan and Rome. A Paris office is also in the pipeline.
Banham said: "We are growing constantly as we develop more work for our clients; we need quality senior creatives to oversee it all. This is about ramping London up, so I can step out and let it run itself."
He added that the move was about combining Robinson's "advertising and design background" with Curtis' "web and online" background to drive the agency's integration.
Curtis and Robinson will be responsible for all of the London offices' creative output. They will work with the creative director, Steve Whiteley, to direct the group creative heads on clients such as BT, Ikea and Procter & Gamble.