The Smarte East Alliance is a four-year deal covering construction work potentially worth £500m during the next four years.
It is an alliance between three East of England local authorities, Essex, Hertfordshire and Suffolk County Councils.
The authorities now want a single operator to handle project management, CDM co-ordination and cost management.
The contract is listed as worth from £7m to £33m.
Interested bidders have until February 29 to apply to Essex County Council acting on behalf of the Smarte East Alliance PO box 4, County Hall, Market Road Procurement Services Helen Walding CM1 1JZ Chelmsford UNITED KINGDOM +44 1245431846 email2workspace-prod+ECC+WS28108672firstname.lastname@example.org