Facebook Director of Product Management Carl Sjogreen leaving company

Facebook Director of Product Management Carl Sjogreen announced today that he is leaving Facebook to start something new, though he tells TechCrunch he doesn’t have concrete plans about what that will be.

Sjogreen, who led Facebook’s efforts to create the Open Graph app platform, is another key employee to step down following the company’s initial public offering in May. Chief Technology Officer Bret Taylor announced his departure last month, also with entrepreneurial plans. Director of Corporate Communications Barry Schnitt recently left Facebook for Pinterest. It is common for long-time employees to leave a company after it goes public, though for Facebook, it will be especially important to retain leaders who believe in the social network’s mission and vision of the future.

Sjogreen came to Facebook in 2010, through the company’s acquisition of travel startup Nextstop, of which he was a co-founder. Sjogreen soon took on many of Taylor’s product management responsibilities after Taylor was promoted to CTO. Before Facebook, Sjogreen led Google Calendar and helped Google build up its presence in Australia and New Zealand.

In a Facebook post shared with friends and published on TechCrunch, Sjogreen says of his departure, “I’ve always been an entrepreneur at heart and I’m excited to be starting something on my own again, but I will miss all of you at Facebook tremendously.”

We sat down with Sjogreen earlier this year for a fireside chat about the Facebook platform at our Inside Social Apps conference. He told the audience, “What you’ve seen from Open Graph so far is a small part of the vision.”