Crow left the agency last week. He had worked for Synergy for 18 years, and as chief executive for the past 10, and will "pursue new ventures", according to a statement from the agency.
There are no immediate plans to recruit a successor, with the business now being led by managing director Lisa Parfitt and chief strategy officer Carsten Thode, assisted by director of strategy Tom Gladstone and creative director Josh Robinson. Dominic Curran continues as chief executive of Synergy US.
The news follows a , and comes the week after the announcement of the departure of Adam Raincock, who led Synergy's comms business.
Synergy's statement said: "Under Tim's leadership, Synergy became established as a leader in sports and entertainment marketing, winning an array of clients and awards, continually innovating its offering, and launching in the US."
Tim Crow said: "It has been an immense privilege to lead Synergy and to have been part of Engine for the last ten years. I will have nothing but great memories of the people and clients I've worked with and the great work that we've created together. I leave safe in the knowledge that Synergy and Engine will go from strength to strength."
He declined to comment further when contacted by ±±¾©Èü³µpk10's sister title PRWeek.
Debbie Klein, chief executive of Engine Europe and Asia Pacific, said "We are sad to see Tim leave the Engine family and enormously grateful for all his hard work, as well as the strong leadership team he leaves behind. We wish him well in his next venture."
Major clients of Synergy include Accenture, Beko, BMW, MasterCard, SSE, Aberdeen Standard Investments and Under Armour.
A version of this story was first published by .
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