
Barnett had been consulting for Haygarth and starts full-time at the agency on 1 December 2009.
At OgilvyOne Barnett headed the agency's global Unilever account working on brands such as Dove, Flora and Hellmann's.
Before this he was a director at FullSix working on digital, direct and e-crm campaigns for clients including Hertz and Reckitt Benckiser.
Barnett reports to Haygarth's managing director, Marcus Sandwidth.