Certainty is good for business. Ireland has now produced a series of standard contracts for use in public construction and engineering projects. They are available online from the Department of Finance HERE. The contracts are designed to transfer certain additional risks to the contractors. Provision has been made for the Employer to stipulate the hiring of certain specialists and to assign design responsibility to the contractor.
There will be, presumably no need to trawl the world for good precedents for such projects, as suggested HERE.