Role of the Engineer
The FIDIC contracts usually involve "the Engineer", who has a defined role to play during construction - and we assume this is the "different Consulting Engineer" referred to. The "Designing Engineer" could be an engineer engaged by the Employer just to design the Works (with the other Engineer taking over to supervise the Works during construction) - or he could be an engineer engaged by the Contractor if it is a design-build or turnkey type project. In the first case, presumably he would be engaged under the FIDIC White Book (or something similar) and his terms of reference under that should define his role (if any) during the construction period. In the second case (if he is engaged by the Contractor), he will presumably be considered to be a part of the Contractor's organisation carrying, in effect, the Contractor's responsibilities in the Contract for design. - See more at: http://fidic.org/node/915#sthash.H0GkqEib.dpuf