EEW will work with Gulf Island Fabrication, which produced the foundations for the US' debut offshore wind project.
The two firms will be set to supply foundations to the JV's up-to-1.6GW Bay State Wind project off the coast of Massachusetts. The project's permitting procedure will be expedited following an approval last month.
"EEW and Gulf Island Fabrication recently visited Massachusetts to view potential site locations to build its US hub.
"The new facility, manufacturing and load-out will generate approximately 500 annual construction jobs with up to 1,200 additional annual indirect jobs in the local community," the joint venture said.
The JV said the move would mean the US will set up its first manufacturing site of this type, launching a whole new industry in the country.
EEW is a long-standing partner of Ørsted, having previously supplied the monopile foundations to many of its European projects.
"Being able to bring the world's pre-eminent steel manufacturer in the offshore energy sector along with Gulf Island Fabrication, a premier US fabrication company, to work on the Bay State Wind project is a tremendous honour," said Thomas Brostrøm, president of Ørsted North America.
"In addition to an unmatched record of safety, EEW has been a long-time partner of Ørsted's which will make for seamless project management and a strong, trusting working relationship."
The Ørsted-Eversource JV has also entered a bid in the Connecticut request for proposals (RfP) launched in February
The joint venture's roughly-200MW Constitution Wind project would be the first offshore wind project in the state.
It will be located 105km off New London, in the east of the state. Ørsted claimed it would directly contribute $93 million to the state's economy.
Connecticut issued the RFP for offshore wind projects off the New England coast capable of producing up to 825GWh/year.
Successful projects must start delivering power to the grid between 1 July 2019 and 31 December 2025, according to the RFP by the Connecticut's Department of Energy and Environmental Protection.
Developer Deepwater Wind, which owns Block Island, the US's first offshore project, said it has also entered a bid in to the RfP in Connecticut.
The firm's 20MW Revolution Wind project would be located between the New York state's Long Island and Massachusett's Martha's Vineyard, directly south of the Connecticut shoreline.
Revolution Wind was also submitted to the Massachuetts offshore RfP in December. The developer said the project could be expanded to accomodate both state's or be a standalone site, "depending on the results of each state's procurement".
The Revolution Wind site could also include a storage facility, Deepwater Wind said.