America's largest bank is set to create almost 200 new jobs at its Belfast base.
Citigroup is the largest bank in the United States
Citigroup has announced that the 185 jobs will be based at its technology centre of excellence in Belfast.
It said the investment would "contribute a further £21m to the local economy" and bring employment at Citigroup's Belfast operation to 560.
Invest Northern Ireland has offered £3.6m in financial assistance for the investment.
Secretary of State Peter Hain said Citigroup's commitment to Northern Ireland was clearly evident through several major investments it had made.
"This new investment will strengthen Citigroup's presence in Northern Ireland, provide high quality, sustainable career opportunities and further enhance and build Northern Ireland's reputation as a world class centre for financial services companies," he said.
Robert Druskin of Citigroup Corporate and Investment Banking said its Belfast centre "has delivered significant benefits to our global operations".
"With the rapid development of our Belfast operation, we are now in a position to strengthen our presence with a second major investment," he said.
"We are confident that through our renewed commitment to this region we will continue to add value both to Citigroup and the NI economy."