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Each week we ask high-profile technology decision-makers three questions.

Wunderman is a global network of advertising, marketing and consulting companies. They specialise in "digital, social, mobile, local, performance and data-driven" marketing.

Gregory Roekens is Wunderman's UK chief technology officer, responsible for coordinating the creative and marketing technology offering across the UK network.

He has 15 years of expertise in marketing and creative technology - and his role at Wunderman is to identify how best technology can be leveraged to help marketing move into the 21st century.