Newry fit-out company MJM Group has opened an office at "the heart of the cruise industry" in Southampton.
The firm, which counts luxury cruise lines among its clients, said it is also aiming to expand its land-based business.
And it has announced the recruitment of a new sales and marketing team to implement its corporate plans. Gary Annett, chief executive, said: "MJM Group has established itself as the world's leading interior fit-out company for the marine and land-based industries and we are delighted that our growth over the past five years is set to continue.
"Establishing ourselves in Southampton is a strategic decision to have a presence in the heart of the UK's cruise industry and to develop stronger links with the UK's strengthening construction industry.
"Our new sales and marketing functions will focus on the implementation of our company corporate plans."
The port of Southampton in the south-east of England is the cruise capital of the UK. There are four terminals for liners there, and it is home to companies including P&O Cruises, Princess, Cunard, Royal Caribbean, Celebrity, MSC, Carnival Cruise Line and Fred Olsen.
As well as its work for cruise and ferry companies, MJM also has a major land-based fit-out business, and recently finished work on Adare Manor, a luxury hotel in Co Limerick.
And last year its Mivan division carried out work on the fit-out of the Grand Hibernian luxury train for high-end travel company Belmond.
The company acquired the Mivan brand when the fit-out firm of the same name collapsed three years ago.
According to its most recent results, MJM Marine reported a 50% jump in pre-tax profits of £7.5m. It also had a 4.4% increase in turnover to £62m in 2016, which it described as "a very successful year" in which it secured deals across different locations and industries.
The company was founded by Brian McConville, who is now chairman of the business.