Twitter’s media team has seen quite a bit of turnover recently, and now the company’s quest to restructure its media operations has led to another departure: Kirstine Stewart, who was in charge of North American media partnerships, is out. Her departure was first reported by Recode.

Stewart joined Twitter in 2013 from Canadian broadcaster CBC, and was in charge of media partnerships in North America and Canada for the company.

Twitter’s media team has seen a few high-profile departures in recent months, with VP of media Katie Stanton leaving in January, and her successor Nathan Hubbard leaving in May. In June, Twitter appointed Ross Hoffmann as its new head of Media.

Hoffmann is now directly reporting to Ali Jafari, who is running Twitter’s Amplify video advertising business. As part of this move, Twitter has also been restructuring its media team to bring Amplify, traditional media partnerships and media-related business development all under one roof. There was no room for Stewart’s role anymore in this new structure, sources told Variety, which is why the company isn’t looking for a direct replacement.

A spokesperson confirmed Stewart’s departure, sending Variety the following statement via email: “This year we’re focused on delivering on five product priorities – refining our core service, live-streaming video, creators, safety, and developers – as well as recruiting great talent. We’ve successfully increased our shipping cadence on our core service and have asked some of our top leaders to take on key roles in the other priority areas.”