This is a regularly maintained collection of Tweets from journalists announcing a change in their role. The moment when a journalist takes on a new beat can be an opportune time for PR professionals to pitch. Indeed, when starting out in a new position, journalists often invite suggestions for stories to cover.
If you find job move information useful you can bookmark this page of embedded Tweets*, or you can monitor the job move timeline directly on Twitter. For faster notification of job moves you can receive these job move alerts alongside journalist requests as part of the Dot Star Media journalist request service.
* until the moment that Twitter removes support for embedded collection timelines.