A few days ago, Matt Booty, the former head of Microsoft's Minecraft business, was promoted to Corporate Vice President of Microsoft Studios. As such, his previous position became vacant.
Shortly after the announcement, Redmond announced that Helen Chiang would be the new head of Minecraft. Chiang has worked at Microsoft for nine years and has overseen numerous operations during her tenure. She has worked with the Minecraft team for the past three years and knows them well.
Full story from the WindowsCentral blog...