Facebook has hired former Deputy Prime Minister Nick Clegg to lead their Global Affairs and Communications team.
He is due to start the job on Monday, with his family moving to Silicon Valley, California in the new year.
The former Liberal Democrat leader lost his Sheffield Hallam seat in last year’s General Election, after leading the party from 2007 to 2015.
Mr Clegg will replace Elliot Schrage who left the social media company in June.
The former Deputy Prime Minister wrote on Facebook: "I am delighted to be joining Facebook. After almost twenty years in European and British politics, this is an exciting new adventure for me.
"Having spoken at length to Mark and Sheryl over the last few months, I have been struck by their recognition that the company is on a journey which brings new responsibilities not only to the users of Facebook’s apps but to society at large. I hope I will be able to play a role in helping to navigate that journey."
He added: "Throughout my public life I have relished grappling with difficult and controversial issues and seeking to communicate them to others. I hope to use some of those skills in my new role.
"As someone who has spent a lifetime arguing for Britain’s wholehearted commitment to Europe, it is of course a wrench to be leaving the public debate at a crucial time in the Brexit process. But the key decisions will soon pass to Parliament, of which I am no longer a Member, and once I had decided to take up this unique new challenge at Facebook, I felt it was best to get going sooner rather than later."
Increase transparency around political advertising
Facebook founder and CEO Mark Zuckerberg
This comes after Facebook faced criticism from data protection watchdogs after it admitted that up to 50 million users were exposed to ID fraud last month.
Facebook is introducing tools it says will increase transparency around political advertising on the platform in the UK.
The social media network announced a new authorisation scheme to approve organisations before they can run political adverts on the site.
It is also extending its Ad Library to include the UK, which will show all adverts currently being run by a page or organisation on Facebook and Instagram for up to seven years.
The company said the new tools are part of a commitment it made during appearances before the Department for Digital, Culture, Media and Sport earlier this year to offer more transparency around political advertising.
It comes after the platform was scrutinised for its policies towards advertising as questions had been raised over the use of online ads, particularly around the last US presidential election and the EU referendum in the UK.
The Ad Library will enable anyone - whether or not they use Facebook - to search for and access the political advertising history or any Facebook or Instagram page or by search term.