Japanese electronics firm Fujitsu has told staff of plans to cut up to 1,800 jobs in the UK.
The plan, which could see the first workers leaving in early 2017, is not linked to Brexit, the company said.
Fujitsu, which has 14,000 UK staff, said the job losses would be across its UK offices as it looks to compete better with foreign rivals that offer IT services more cheaply.
Trade unions called the cuts a "hammer blow" to Fujitsu's UK workforce.
The firm has a range of businesses in the UK, from software services to providing air conditioning units.
It has many offices across the country, including in Manchester, Belfast, Crewe, Bracknell, Solihull, Wakefield and Warrington, but has not decided yet where jobs will be cut.