The college is embarking on a capital development programme to improve indoor sports facilities for its 1,300 pupils.
Graham has secured one of the two projects within the programme, the Eton Sports and Aquatic Centre, which is being built on the site of an existing outdoor pool.
A three-storey building comprising a 25m indoor pool with diving facilities and a moveable floor, as well as a four-court badminton hall.
The building will be primarily naturally ventilated with opening windows and vents, while PV cells on the roof of the sports hall provide a renewable energy source.
Rob Joyce, Graham’s London office director, said: “Eton College offers an excellent sports and activities programme enabling its students to identify and develop their own skills and strengths.
“While tradition remains important, its capital development programme is an example of its faculty’s modern and forward-thinking approach to teaching and learning, and the new Eton Sports and Aquatic Centre will enable the school to offer a leading sports programme all year round. We will be drawing on our substantial experience from across the education sector, including the similar activity we recently carried out at Oundle School in Northamptonshire to help deliver the works at Eton College.”
The works will be delivered over a 78-week programme.