Southampton City Council has selected Carillion to deliver its £35m Academy programme.
This follows a five-month design competition involving the council, its Academies sponsor Oasis Community Learning, plus the two competing construction firms, Carillion and Balfour Beatty.
Carillion will work alongside architecture practice Jestico and Wiles.
Southampton councillor Paul Holmes said: "Carillion's bid was of outstanding quality and far surpassed our expectations. The Academy they have promised us will be iconic. It will also contribute to our sustainability vision, being carbon neutral, and bring new apprenticeships, jobs and work placements to the city."
During the design competition Carillion produced concept plans for Oasis Academy Mayfield - a rebuild project worth in the region of £15m. They will now also be invited to develop plans for Oasis Academy Lord's Hill, worth approximately £20m.
Southampton's two Oasis Community Learning sponsored schools opened their doors in September 2008, replacing four community schools after a city-wide review of secondary education. The Southampton Academies are two of eleven schools sponsored by Oasis Community Learning around the UK.
At the same time as the Academy projects, the city council is moving forward with its £200m Building Schools for the Future (BSF) programme. It submitted its BSF Outline Business Case (OBC) to government in February and is now awaiting approval.
The city's BSF plans will be delivered in two phases. In total it aims to rebuild or remodel seven secondary schools, improve ICT at a further three and revamp up to four special schools.
The programme is expected to go into procurement within the month.