Galliford Try and Vinci will work in joint venture to carry out the redevelopment of The Grange School in Runcorn and the redevelopment of Wade Deacon High School in Widnes.
Work starts this month and completion of construction is expected in April 2013.
Galliford Try chief executive Greg Fitzgerald said: "We are delighted to reach financial close as a construction and investment partner on this significant project which reinforces our strong reputation and market position in the education sector."
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