Fielder joins the agency, founded by the former senior vice-president of Universal McCann Europe, John Crowley, in January 2002, to work on a range of consultancy projects spanning all areas of advertising and marketing. He said: "After the stimulation and friendships of the past 21 years, I have been looking for new challenges and environments into which I can throw myself. Blackbird is an exciting solution to the world of change which confronts us all."
Fielder took a wide range of roles during his 20 years at Leagas Delaney, and had a 16 per cent stake in the company at the time of his departure.
He was part of the management team that bought Leagas Delaney back from its parent company, Abbott Mead Vickers BBDO, in 1998, and was the chairman for eight years before Bruce Haines took the role in 2000. He became group media director in 1998.
Fielder, along with the finance director, Eric McLean, was tipped to leave Leagas Delaney in January, following the departure of Haines from the agency and the collapse of a £60 million deal which would have seen it fully owned by the Canadian marketing group Envoy Communications.