International competitive bids are invited for the design, supply and installation system submarine and underground cables for 150kV cross-linked polyethylene (XLPE) Interfaces Paros –Naxos and Naxos–Mykonos as part of the Cyclades Islands Interconnection Project that concerns the implementation of a subsea cable grid operated at 150 kV that will connect the main Cycladic islands Syros, Tinos, Mykonos and Paros with the mainland interconnected system of Greece.