Contracts have now been agreed for Kier to provide the Isle of Sheppey Academy and its flue accessories on behalf of Kent County Council.
The site is valued at £54 million and will lead to a new facility being built across two sites on the east and west of the island, which will be used by 2,450 students. A renewable energy strategy will be adhered to during the complex's construction.
Kier Group chief executive Paul Sheffield, said: "As a company committed to providing first class learning establishments for the 21st century, Kier is particularly proud to be involved with the delivery of this landmark scheme.
"The construction team looks forward to demonstrating its ability to deliver educational facilities that enhance the learning experience and are of award-winning calibre."
Construction work has now started on both of the Sheppey sites, with a completion date scheduled for August 2013