More than 120 jobs are going at a cable factory on Tyneside, union officials have been told.
AEI Cables in Birtley, which employs about 350 people, makes cables for the defence and civil engineering sectors.
The GMB union said it was considering legal action after claiming the firm refused to consult over redundancies.
No-one was available for comment from AEI, which last year won an £8m order to provide cabling for new Royal Navy aircraft carriers.
A GMB spokesman said: "It's very surprising that this has happened when manufacturing in this sector is apparently doing well.
"We were not consulted in any way about these redundancies and we have about 200 people still at the company who are now worried about their futures.
"In view of what has happened we have been left with no alternative but to seek advice from our solicitors."