RBSI announced the loss of 90 posts in its offshore operations in March
Jobs are being lost at the Royal Bank of Scotland International's (RBSI) operations in Jersey, Guernsey, the Isle of Man and Gibraltar.
The decision to axe 28 posts was part of a business restructure and efficiency drive, the company said.
It was "deeply regrettable" the roles would be lost across four offshore jurisdictions, the bank said.
RBSI said it had begun consultations with staff and the Unite union. Nine of the posts have already been closed.
The company said it hoped natural turnover, voluntary redundancy and redeployment would keep the number of compulsory redundancies to a minimum.
Earlier this year RBSI announced 90 jobs were being lost in a different section of its four offshore operations.