vivian schillerVivian Schiller is stepping down at Twitter after a year as head of news partnerships for the social messaging network.

Schiller, a former NPR and NBC digital guru, was hired last fall to foster relationships with news organizations and journalists.

She said she is leaving the company so that Twitter's new head of global media, Katie Jacobs Stanton, "can reorganize as she sees fit." Schiller called the year-long stint a "fascinating experience."

Chloe Sladden left in June as head of media at Twitter, following the exit of COO Ali Rowghani. Both Sladden and Rowghani recruited Schiller for the Twitter post.

Hill vet and C-Span exec Adam Sharp now heads news and government partnerships for Twitter. Canadian Broadcasting Corp. alum Kirstine Stewart is head of media.

Schiller is former SVP and GM of NYTimes.com.