The £300m programme involves the redevelopment of the Barrow site in preparation for the building of a replacement for the Vanguard class submarines, as part of the renewal of the UK’s nuclear deterrent.
Works will include a mix of new build projects and the refurbishment of existing facilities in what is the most significant redevelopment of the Barrow-in-Furness site since the 1980s.
Over the course of the 8-year programme the firms will help to upgrade operational sites and deliver the integration of works into existing submarine build programmes.
Work will commence in early 2015.
Andrew Wyllie, chief executive of Costain, said: “We have been selected for our expertise in the process, mechanical and electrical delivery of nuclear projects, as well as our reputation for working collaboratively with our customers, other delivery partners and the local community.”