Paul Adams, Facebook's global head of brand design, announced Friday that he has left the social network to join startup Intercom, which makes a social customer relationship management tool.
Adams joined Facebook in early 2011 and led the social network's design and marketing projects for clients such as Starbucks and Nike.
Prior to Facebook, Adams spent four years on Google's user experience team, and worked on Gmail, the now-defunct Latitude and Buzz, and YouTube. He also helped dream up the idea behind Google+ Circles, a way to group friends, which was released only months after his departure.
Adams departure follows a long list of execs who have moved on since Facebook went public. Blake Ross, the social network's director of product, left in February, and Engineering Director Josh Wiseman took off a few weeks later. Facebook's general counsel Ted Ullyot will also leave this summer.