May Gurney has been appointed as the preferred bidder for Lambeth Council's Building Schools for the Future (BSF) programme.
The 10-year contract includes refurbishment, ongoing maintenance and facilities management, information technology and support.
During the first five years of the contract, the LEP will deliver educational services, valued at up to £185m, to the Council's secondary school estate.
The first phase of the contract covers five schools, and the second phase a further 11.
May Gurney is anticipated to begin work on the programme in September 2010.
There is a further £190m of potential work on Lambeth’s primary schools.