Twitter’s head of news Vivian Schiller is stepping down:

Vivian Schiller, the high-profile NBC and NPR exec whom Twitter hired to run its news unit, is leaving the company as part of a consolidation. Adam Sharp will now be in charge of both news and government at the social messaging company, as part of a larger consolidation across the media division by its new head Katie Jacobs Stanton.

Here’s Schiller’s own tweet about it:

1/3 Stepping down from Twitter so new global media lead @katies can reorganize as she sees fit. Wish everyone at twitter nothing but best.— Vivian Schiller (@vivian) October 8, 2014

There’s been an interesting trend of social-savvy journalists finding their way into the social networks – think Joanna Geary at Twitter in the UK, Hannah Waldram at Instagram and Liz Heron at Facebook – but the path is clearly more rocky than you’d think. The Tumblr newsroom was an early example of that.