Pattison (pictured), who launched PHD in 1990 alongside Nick Horswell and Jonathan Durden, has handed his notice in to Omnicom management. He will leave PHD next year.
He said: "I've been at PHD for 17 years, I've done six years since the end of my earnout from Omnicom and PHD could not be in better shape, so it feels the right time to move on."
He said: "I've been at PHD for 17 years, I've done six years since the end of my earnout from Omnicom and PHD could not be in better shape, so it feels the right time to move on."
Pattison's decision follows the roll-out of PHD as a global network this year, which saw the opening of key offices in Southeast Asia, China and New Zealand.
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