Ulster Bank staff who are members of the Financial Services Union (FSU) have narrowly voted to accept a terms of transfer deal governing their movement from Ulster Bank to AIB.
In total 250 jobs will transfer following the purchase of the €4.2bn Ulster Bank commercial loan book by AIB.
The first movement of staff will begin at the end of July.
The FSU, which had negotiated the deal with AIB, said it would protect jobs, retain many existing working conditions and enhances others.
"The vote by the members to accept the terms concludes months of intense and difficult negotiations between the FSU and AIB," said Gareth Murphy, Head of Industrial Relations and Campaigns with the FSU.
"We believe these proposals, agreed today by our members, best protects members working conditions in the move to AIB."
The FSU said the deal will give transferring Ulster Bank staff certainty on pension entitlements into the future.
It will also protect existing working hours and give certainty on pay.
The negotiations between the two banks were complicated by the fact that remuneration restrictions put in place on the banks that were bailed out by the State following the financial crash, including AIB, do not apply to Ulster Bank staff.
"It highlights the need for ordinary workers remuneration to be considered separately from that of CEO's and executives," said John O’Connell, FSU General Secretary.
AIB is also buying around €5.7 billion of Ulster Bank’s performing tracker mortgages.
