Mace, Hochtief, Turner & Townsend and Unipart join Amentum, the lead partner.
Nationwide deployment of the reactors will create 100,000 construction jobs.
Three workers died on a Texas LNG site after a platform they stood on collapsed.
New plant to use geothermal energy to make 480,000 tonnes of fertilizer.
The 540-foot cooling tower has remained unused for four decades.
The firm will oversee front-end engineering and planning for the LNG facility.
Bechtel’s share of Train 4 construction is estimated at $4.77 billion.
The plant will produce 100,000 tonnes of green ammonia annually.
The Russia-backed nuclear project will feature two 1,200MW units.
The closure threatens jobs and the future of sodium-ion batteries.