The Government has opened up bidding for the chance to depose Capita from the management of Constructionline.
The system registers firms wishing to bid for public sector building construction contracts to save them from having to prequalify for each bid.
Over 14,000 firms are signed up on its databases with management costs covered by subscriptions paid by each company.
Capita has operated Constructionline since it was introduced in 1997. Its initial seven year deal was extended by a further three in 2005 but this extension is now nearing the end. It is understood that it needs to be renewed by September.
Firms have until 17 March to throw their hats in the ring for a four year deal to run the system.
Shortlisted bidders will be invited to tender by 20 March with a winning bidder expected to be appointed by August.