Fujitsu is to build the new Fibre-to-the-Premises (FTTP) network in York, which will be used to deliver Sky and TalkTalk super-fast broadband deals.
The move was expected given that the Japanese firm has a general engineering agreement with CityFibre, the infrastructure firm that is working alongside Sky and TalkTalk.
In a statement, CityFIbre said Fujitsu was chosen for its "in-depth knowledge and experience of delivering networks for Tier 1 Operators in the UK and abroad".
The firm's ability to build networks at scale was also a determining factor, it noted.
"Network planning is well advanced and the first technology and construction activities aimed at optimising deployment speed, cost and quality are commencing in late October," CityFibre added.
"Fujitsu will undertake all of the build activities including detailed network planning, civil and network construction, testing and interconnection of the FTTP network."
Plans for a new full-fibre broadband network in York were announced by the project partners in April this year.
Under the first phase of the project, around 20,000 homes and businesses in the city are set to gain access to 1Gb broadband services.