Chief comms adviser Donald Steel is taking on the additional role of acting head of comms for the BBC's Journalism group.
He takes over from John Shield, who leaves this week to take up the role of director of comms for Go Ahead Group.
In addition, comms manager for news and current affairs Karen Rosine will be responsible for the day-to-day operational comms handling of news and current affairs output and will continue to support the senior leadership team in journalism.
At the same time, the publicly funded broadcaster has appointed Nixon McInnes to provide training on social media for its top 100 comms staff.
The three-part course includes an introduction to social media, its use for publicity and managing issues and reputation over social media.
The news comes after head of corporate affairs Tina Stowell announced that she is leaving to pursue a political career, having become a Conservative Party parliamentary candidate earlier this year.
Stowell was formerly director of comms at the BBC Trust.