More than 2,400 jobs have been secured at outsourcing giant Resource after it was acquired by a Dublin-based competitor for an undisclosed sum.
Noonan's acquisition of Resource – formerly known in Northern Ireland as Maybin – comes after receivers and administrators were appointed to some companies in the Resource group on Thursday.
Noonan has acquired the business and operations of the Resource Group, which delivers facility services across the private and public sectors in Northern Ireland, Great Britain and the Republic of Ireland.
Resource is number 12 in the Belfast Telegraph's Top 100 companies, and in its results for the year ending September 2013, made pre-tax profits of £500,000 with turnover of nearly £33m.
A spokesman for Noonan said that the acquisition of the Resource business will have the immediate effect of protecting the jobs of more than 6,000 of Resource's employees, 2400 of those based in Northern Ireland. He said it would also ensure continuity of service for existing clients.
Based in Belfast and operating throughout Northern Ireland, Resource had been the region's largest support services company with clients in both the public and private sectors.
The company provides security, cleaning, infection control, car park management and support staff. The firm has offices in Leeds, Glasgow, the Isle of Man, Belfast, Dublin, Galway and Limerick.
Clients vary from Government agencies to financial services companies and from major retailers to universities and prominent manufacturers.
In 2012 the company completed the restructure of its business with the sale of low-value cleaning contracts, while securing significant new support contracts with the PSNI, Translink and the Health Service Executive in the Republic.
Resource was formerly known as Maybin, which was itself bought over several years ago.
Noonan was established in 1977 and already has an office in Lisburn as well as operations in Dublin, Limerick, Cork, Galway, Waterford and London. It employs around 7500 people.
Welcoming the move, Noonan chief executive John O'Donoghue said: "I am pleased to welcome the 6,000 strong Resource team to Noonan, where our complementary expertise, expanded service offering, and innovative cultures can better serve our new and existing clients."