Construction of Bombardier Aerospace's 600,000 sq ft (55,740 sq m) CSeries factory in Belfast is scheduled to begin this month, and plans are in place for the airframer to add another 800 jobs.
The facility, which will be responsible for producing the CSeries wings, will be built in two phases.
"The total investment represented by the CSeries wing programme in Belfast, including the new factory, amounts to £520 million ($860 million), which is the largest ever single inward investment in Northern Ireland," says a Bombardier spokesman.
"Some 270 Bombardier engineering and support staff are currently engaged in the research and development of the wings, and around 800 jobs will be generated in Bombardier during the period of peak production."
Bombardier is the largest investor in Northern Ireland and the largest manufacturing company. It already employs some 5,000 people.
Belfast is on track to deliver the first CSeries production wing in 2011. The Pratt & Whitney geared turbofan (GTF)-powered aircraft is scheduled to enter revenue service in 2013.