Trayner has worked as an adviser to Tony Blair's polling aide Philip Gould, as well as with Stan Greenberg, a pollster for former US president Bill Clinton. Trayner met Nick Claydon, a partner in Brunswick's London office, while working for Gould.
He is looking to hire researchers for the new division over the next few months. He has also written on the politicisation of business and the impact of new technology on comms. Trayner worked at OLR for three and a half years.
Brunswick's major clients include British Airways, The Body Shop, Corus and House of Fraser, as well as other big household names.
The research practice adds a further element to Brunswick's offering. The agency already has financial, arts and construction and property communications teams, among others.
Opinion Leader Research appointed Sarah Michell as research director last month.