Lloyds Banking Group is to cuts about 80 positions at its operations in Shannon, it was announced today.
The job losses are part of a wider cutback in its insurance division as part of its integration with HBOS, with about 200 jobs in total to go.
The remainder of the job losses spread across the UK, a spokeswoman for the bank said.
Britain's Unite union called on Lloyds chief executive designate Antonio Horta-Osorio to reverse the job cuts.
"The boss of this taxpayer-supported company has yet to intervene to ensure those working hard to make the bank successful are not simply discarded," said David Fleming, Unite national officer. "He needs to ensure there are fundamental changes on his watch."
Lloyds, based in London, has cut more than 26,000 jobs since it acquired mortgage lender HBOS in 2008. The bank is 41 percent owned by the government following a bailout of more than £20 billion during the financial crisis.
Bloomberg