A shortlist of four bidders is vying to build seven temporary swimming pools next to the £251m Aquatics Centre at the London Olympics site.
Work involves the construction of two 33m water polo pools, which will host matches during the Games.
Three 50m swimming practice pools will also be built alongside a 33m practice water polo pool and a 30m synchronised swimming facility.
The quartet fighting it out for the contract are Fluidra, Balfour Beatty, A&T Europe and ES Group.