He said: "The decision to leave was a mutual one. I am currently on two-months of gardening leave and there is a lot in the pipeline."
Myhre left GPJ on 2 September, with Larry Vallee, president of Project: Worldwide assuming the role of chief executive Project: Worldwide, and Peter Streicher has been appointed senior vice president, managing director GPJ EMEA Group reporting into Vallee´s office.
Meanwhile, Olivier Vallee has been appointed vice president, commercial director at GPJ, leading the GPJ UK operations.
A statement from the agency said: "GPJ´s position in the European market has been further strengthened due to these changes and we remain financially rock solid."
George P Johnson executive director business development Kevin Jackson told C&IT that Myhre's role was one of strategic influence across the group.
Project: Worldwide is the parent company of GPJ with brands including Juxt and G7 Entertainment Marketing.