Ballymena bus company Wrightbus is creating 130 news jobs at its factory in Antrim.
The family owned company is making a total investment of £14 million in the expansion, with more than £10m earmarked for research and development projects.
Seventy of the new jobs are already in place and the remaining 60 - which will pay an average salary of £19,500 - will be added over the next two years.
Invest NI is supporting backing the company’s own investment with a grant of £2.5m.
Wrighbus employs around 1.800 staff in Northern Ireland.
Last May, London mayor Boris Johnson announced that the Co Antrim company would build 600 double-decker’s, championed by him and dubbed the ‘Boris bus,’ over a three-year period.
On a visit to the factory, he hailed the state-of-the-art bus as one of the greenest in the world.
Announcing the latest investment, Enterprise Minister Arlene Foster said: “Wrights Group is one of our most successful indigenous manufacturing companies, and this is in large part due to its continuous focus on innovation.
“In the last five years Wrights Group has undertaken a number of successful R&D projects that have significantly boosted its sales and international profile.
“This investment will further strengthen its product portfolio and its ability to sell into markets around the world.”
The minister added: “The company has high growth potential as is reflected in the creation of 130 new jobs, which will generate £2.5million a year in wages for the local economy. It is also strategically important to the Northern Ireland supply chain.”