Dean & Dyball, Alfred McAlpine, HBG and Warings Contractors have been chosen by Howsmoor Developments, a joint venture between Laing Property, London & Metropolitan and Sydney Freed Holdings, to work up final bids for the 77,000 m2 scheme.
A source close to negotiations said Dean & Dyball was one of the first to make the shortlist as it partners with Laing Property on West Country projects.
The incubator, to be called the Academic Innovation Centre, will take 1500 m2 of space in the first phase of the project. It is the brainchild of the universities of Bristol and Bath, which are aiming to emulate the success of Cambridge University's science park.
Outline planning consent was granted by South Gloucestershire council, on the condition that at least 1500 m2 of the site is taken by the universities' incubator.
The architect for the scheme is Hamilton Associates, engineer is Cundall Johnston and quantity surveyor is Gleeds.
Work is expected to start by September.