One Two Four, an amalgamation of Twofour Group and Twofour Digital, which merged earlier this year, offers content services such as videos, events and design for brands such as Levi's, Sony, British Heart Foundation and the BBC.
The account was won following a non-competitive pitch process and there was no incumbent agency.
Targeting branding professionals, the campaign will include an influencer-briefing programme, organising agenda-setting commentary and opinions along with a press office service.
