Joss Mathieson joins from retail banking parent Barclays Bank, where he worked in a non-comms role as a manager of group strategy and planning.
His appointment as head of internal comms signals a first for the investment bank. Internal comms manager Jane Jerone previously handled the entire remit, but now reports into Mathieson.
Barclays Capital has handed Mathieson a remit concentrating on strategy, drawing on his previous experience leading planning on the retail banking side.
Barclays Capital PRO Caroline Rouse said: 'We do most of our internal communications via the intranet, which has been fairly static for a while.
'We now want to explore other channels such as notice boards and presentations.'
The group is also planning to launch a Barclays Capital edition of Barclays' staff magazine Barclays Globe.
Rouse confirmed that the creation of Mathieson's role forms part of a strategy to develop PR, led by global head of corporate comms and marketing John Anderson.
'We have been developing the team over the last year, building up a small UK team of no more than three up to around six people,' said Rouse.
Anderson began the boost of the department when he joined over a year ago from JP Morgan Chase & Co (PRWeek, 13 August, 2001).
Barclays Capital this week also announced the appointment of Andy MacMillan to the long-vacant role of head of corporate comms and global marketing for the Americas, based in New York.
He joined from Nasdaq, where he acted as SV-P of corporate comms. Prior to Nasdaq, MacMillan headed PR and comms at Credit Suisse First Boston in the US.
Both MacMillan and Mathieson report to Anderson in the UK.