The appointment follows a remarkable 12 months in which the Guardian was named newspaper of the year, its investigations changed the face of media, government, regulation and the police, and its agenda-setting journalism was read by more people than ever before.
Adam Freeman, GNM's Executive Director - Commercial, said: "2011 has been a landmark year for the Guardian. From the exposé of phone hacking at the News of the World to the revelations about Liam Fox and our ground-breaking live coverage of the Arab Spring and English riots, the Guardian has consistently led the news agenda.
"The quality of our journalism and our unique, open approach to publishing on the web have brought us a record global audience of more than 50 million unique browsers. We've also seen a number of highly successful digital launches, including apps for iPad and Facebook. It's a great moment to make a significant investment in our brand.
"We're looking forward to working with BBH on an integrated brand and marketing strategy as we build on our growing international reputation as an open, independent and digital-first media organisation."
Jason Gonsalves, Managing Partner at BBH, said: "At BBH we believe that creativity and a commitment to difference is what enables businesses to outperform competitors and redefine their categories. That's why we are so excited to be working with a pioneering organisation like the Guardian, to give voice to the brand at a time when it is evolving into a digitally powered, global business."
