Engineering experts from the Midlands are spearheading a £ 2 million project to create a venue at the Millennium Dome for the London Olympics.
Keller Ground Engineering - which employs 200 people at Ryton, Coventry - is carrying out piling work at the site as part of a project which includes a 25,000 seater arena in a new entertainments complex.
The news comes as parent company the Keller Group yesterday revealed it has entered the second half of the year with a record order book and a pretax profit increase of 39 per cent.
Chief executive Justin Atkinson said: "The work on the Dome began at the end of June or beginning of July.
"It includes work on the basketball and volleyball arena area."
He said the contract - with an American entertainments group - was worth £2 million.
The Keller Group said it expects to post full-year results ahead of market expectations.
The London-based company said its current trading was "very strong", and it enters the second half of the year with a record order book, representing over four months' sales.
In the first half, Keller's pretax profit rose 39 per cent to £15.6 million, while sales in the period rose 14 per cent, with the growth mainly driven by a strong performance from its North American operations.
The group has raised its interim dividend by 5.5 per cent to 3.8p per share.