One of the field in the civil engeneering where works for specialist contractors like Trevi take on an important percentage of the total project are the maritime works. Design and built project, i.e. jetties, dockyards, bridges, and shore protection are in the track records of Trevi Nigeria and part of the yearly activity.

After the foundation works for the Third Mainland Bridge in Lagos, the first maritime work for Trevi in Nigeria, several projects have been completed, among which there are: the NNPC Jetties and coastal defence in Apapa, Lagos, SPDC jetty in Kidney Island, Port Harcourt, coastal defense works at Brass Terminal for NAOC, shore protection works in Forcados for SPDC, Aker and NAOC jetty in Port Harcourt and many others.