Up to 120 workers at an engineering company based in Crawley are facing redundancy amid "extremely challenging market conditions".
Doosan Babcock is to launch a consultation process with employees on the potential for up to 120 job losses among permanent staff across its UK facilities.
The majority of the positions affected are in management and back-office support services.
The job losses will be spread between Doosan Babcock's main sites at Renfrew and Crawley in West Sussex, and smaller facilities in Tipton, West Midlands, Selby, North Yorkshire and Gateshead, Tyne and Wear.
The company - which employs more than 5,000 people - specialises in providing engineering, aftermarket and upgrade services to the power generation, oil and gas, petrochemical and process sectors.