Building engineering firm Halcrow is to close its Handforth office south of Manchester and operate from one regional base as part of a cost-cutting review.
The engineer, bought recently by US rival CH2M Hill, has also made 55 redundancies nationwide.
Halcrow employs 300 people in Warrington, where it also has a team involved in the highways services joint venture, called A-one+, with Colas and Costain.
There were 89 people employed in the Handforth office, of whom eight will be made redundant and 81 will transfer to Warrington. The Handforth office is due to close on 31 October. It is one of four offices to be shut around the UK, along with Chichester, Crawley and Waltham Cross.
The closures still leave Halcrow with 19 offices and more than 3,000 staff in the UK.
Among Halcrow's clients in the North West are Transport for Greater Manchester, Peel Group, Cumbria County Council and the Nuclear Decommissioning Authority.