Engie has signed a £350 million contract with EDF Energy to extend its facilities management services to the end of 2027.
Under the deal, Engie will continue to provide FM and specialist technical support services to EDF's nuclear power stations in the UK.
Engie has delivered services to EDF energy since 2008 and has more than 1,100 employees at eight nuclear power stations across the UK, and at two coal stations and one gas power station in Nottinghamshire.
Services include facilities management with extra support through project delivery and specialist technical maintenance. Engie also stores, maintains and deploys all the emergency response plant and equipment for the nuclear fleet.
The current contract expires in 2022 and the extension will run until 2027.
Nicola Lovett, chief executive for Engie UK & Ireland, said the latest contract extension was testament to the company's capacity to deliver specialist services.