Mel Davison Construction which carried out repair work for the Northern Ireland Housing Executive (NIHE) has gone into administration. The firm cited financial pressures for its demise.
The Belfast and Portadown-based company currently employs around 150 staff.
On Monday, around 50 workers staged a sit-in at the premises on the Shankill Road, Belfast, after they were told they were to lose their jobs.
It is understood the appointed administrators are now in discussions with the NIHE to see if the service can be maintained to the NIHE's tenants and to minimise any disruption to contracts.
Mel Davison Construction, which was established in the 1980s, carried out response maintenance work for the NIHE in Craigavon, Lisburn, south Belfast and Shankill.