Warne’s role will not be replaced, with Creston saying her day-to-day responsibilities have been taken over by the Health Unlimited board. All Health Unlimited agencies will continue to be led by their existing MDs, reporting directly to Creston CEO Barrie Brien.
Warne becomes the latest senior departure from Creston, following Fever joint MD Frankie Oliver and Nelson Bostock Group Unlimited chairman Martin Bostock earlier this year. Last month Creston announced that Nelson Bostock chief executive Lee Nugent will leave in January.
Warne co-founded Red Door Unlimited with Julia Harries in 2000, and sold the group to Creston five years later. While at Creston, Warne established Health Unlimited.
Brien said: "This has not been an easy decision for Catherine to take, but with the companies within Health Unlimited in a strong position, with experienced management in place to drive their future growth, she feels now is the best time for her to be able to explore new challenges and opportunities.
"I would like to thank Catherine for the huge contribution she has made to the group and Health Unlimited and wish her well on behalf of everyone. Catherine is a hugely respected industry figure who will be greatly missed."