The new head of Xbox is 20-year Microsoft employee Julie Larson-Green. Microsoft CEO Steve Ballmer today announced a large-scale reorganization for the software giant in a letter to employees (opens in new tab), including a new Devices and Studios Engineering Group responsible for Xbox.

Larson-Green will be accountable for all hardware development and supply chain operations for Xbox and other Microsoft devices like Surface Tablets. She was formerly engineering head for the Windows operating system.

Don Mattrick was formerly in charge of Xbox as president of its Interactive Entertainment Business, a role he vacated last week. Wired published a brief profile on Larson-Green, if you’re interested in learning more about the new Xbox boss.

Ballmer said Microsoft means to improve company-wide collaboration with the new divisions and positions.

“We will see our product line holistically, not as a set of islands,” Ballmer wrote. “We will allocate resources and build devices and services that provide compelling, integrated experiences across the many screens in our lives, with maximum return to shareholders. All parts of the company will share and contribute to the success of core offerings, like Windows, Windows Phone, Xbox, Surface, Office 365 and our EA offer, Bing, Skype, Dynamics, Azure and our servers. All parts of the company will contribute to activating high-value experiences for our customers.”

Hear that, everyone? High-value experiences!

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UPDATE: Zynga confirmed the news in press release. Don Mattrick will take over as CEO, and Mark Pincus will continue as Zynga’s chairman of the board and chief product officer.

The head of Xbox is leaving Microsoft, according to a report from tech news site AllThingsD. Interactive Entertainment Business president Don Mattrick may leave his position to take over ailing social gaming giant Zynga, according to AllThingsD’s anonymous sources.

Mattrick was at the center of the Xbox One’s reveal in May. He’s been with Microsoft since 2007, after occupying several positions at Electronic Arts, though his popularity with gamers has suffered after some blowback to Xbox One’s former policies (we thought of 8 ways it could be worse).

The transfer likely isn’t in response to those issues however, as the sources indicated Mattrick has been in talks with Zynga for some time. If he does join the San Francisco-based company, he would take over as CEO from founder Mark Pincus.

We’ve asked Microsoft for comment about these reports, and will update this article with any response.

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