The company set up to manage Bank of Scotland (Ireland) loans is to create 50 new jobs.
Certus was set up by former BOSI management after the bank decided to wind down its Irish business.
It currently employs more than 800 staff and most of the new posts will be based at St Stephen's Green in Dublin.
The jobs are mainly in retail debt management and collection, but there are also roles in commercial banking and operations.
The company provides debt management and recovery services to financial organisations and is looking to expand its customer base.
Certus Chief Executive Joe Higgins said: "The opportunity for Certus to broaden its customer base grows as financial institutions in Ireland reduce their balance sheets and comply with new regulation on how they deal with customers in debt, particularly consumers."
