KPMG is set to establish a new 'Centre of Excellence' in Belfast, creating 200 new jobs.
The company is investing over €16m in the office, which it said will deliver digital consultancy services in the UK and here in Ireland.
It said the centre will provide consultancy services in areas such as cyber security, artificial intelligence and digital transformation.
Invest NI has provided £1m to secure the project for Northern Ireland.
The Northern Ireland Department for the Economy is also funding a training programme, at a cost of £1.3m over three years.
The first Assured Skills Academy will provide participants with training to position them for roles as data scientists, data engineers and network analytics engineers.
KPMG said completing this training will guarantee participants an interview for a role in the Belfast centre.
Northern Ireland Economy Minister Diane Dodds said this new investment will see KPMG almost double its workforce in Northern Ireland.
"KPMG established its first office here in 1974 and has since demonstrated its commitment to Northern Ireland time and time again as its operation here has continued to grow.
"Of the new roles, 160 will participate in my department's pre-employment training programme, which will offer the company a pipeline of skilled graduates over the next three years," she said.
Ms Dodds said they will run eight training programmes over the next three years, with the first one open now for applications.
Johnny Hanna, Partner in Charge at KPMG in Belfast, said this new centre will have global reach.
"The case for building the team here was made easy by the depth of talent on offer in the digital technology space and the assistance of Invest NI.
"This investment cements our commitment to NI and we look forward to establishing a world-class team," he said.