The agency will manage the day-to-day press office for the event, which will raise money for charity Concern Worldwide.
It will also be working with the Twestival London team to support its social media activity.
Mark Borkowski, founder and CEO, Borkowski said: ‘Twestival is an inspiring event and a real positive social media success story. Social media have become such a vital part of how we communicate with one another and it is great to see the Twestival volunteers using this global platform for such a great cause.'
This year's event will take place on the 25th March.