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Offshore services

We see and exploit the connections, efficiencies and potential for innovation between appraise, select, define and operate project phases. Our offering includes consultancy, studies, FEED and detailed engineering for subsea, brownfield modifications, field development and decommissioning.


Field development

The productivity of your asset and success of your business is defined by the quality of appraise and select services.  Our comprehensive understanding of risks and challenges in early project phases, alongside our emphasis on our clients’ business drivers, ensures project uncertainty is minimised from the outset.

Costain can support you through all phases of your field development.  Our expert teams guarantee lean programme delivery focusing on creating efficiency and optimising schedule to fast track your projects.

Brownfield projects and modifications


Costain has a proven and successful track record in concept development, verification studies and the delivery of large EPCm projects for floating production systems. Our specialists will steer your project through the complex process whilst keeping you in full control of all the key decisions.