The multi-billion Trinidad dollar project aims to ease the congested island road network and provide an alternative mode of transport.
The 100km railway to link Port of Spain in the west to the south and east sides of the island.
WSP will provide technical advice to the Government as it oversees the design, build, operate and maintain contract let to French consortium Bouygues, Alstom and Ratp.
Trinidad WSP project manager Vic Stevens said: “By linking Port of Spain to the main commuter towns across the island of Trinidad the railway will be important to the future prosperity of Trinidad and Tobago while doubtlessly being the catalyst for major development outside of Port of Spain.”
The initial phase is expected to last 20 months.