Bage, who took up his role this week, joins from Pagefield where he was an associate partner specialising in public affairs and corporate comms for consumer brands including Kellogg's, Air bnb and Camelot.
He joined Pagefield in 2012 as a consultant. Before this he was public affairs and comms manager at the Advertising Association
In his new role Bage will work with Nadia Gilani – who recently joined as comms manager – to lead a UK comms and campaign strategy. He will also be responsible for increasing Change.org’s political and tech profile
Bage is replacing John Coventry, who will stay with the company to oversee comms in Europe, India and Australia.
Brie Rogers Lowery, UK director of Change.org, said: "Tom is one of the brightest communications talents working in the UK today. We are incredibly excited to be bringing his energy, talent and insight to help us write the next chapter in Change.org’s UK story."
Bage added: "Change.org has exploded on to the UK’s political landscape and given countless people a voice on the issues they care about. Direct digital democracy could be the thing that reverses the breakdown in trust between citizens and politicians – and Change.org’s potential in this space is enormous."
Change.org has grown from 200,000 to 6.5 million UK users in the past three years.