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Our integrated asset lifecycle perspective shortens lead times, enhances the quality of project delivery and provides value-adding project and technology innovation.

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.

Supporting offshore


We provide in-depth subsea engineering and project management, delivering the selected subsea concept through the define and execute phases, into production. We complete the engineering and manage all supply, fabrication and installation contracts, applying technical knowledge, commercial insight and project management skills. Our extensive track record spans greenfield projects, brownfield asset improvement, peer reviews and verification, and decommissioning.

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Brownfield projects and modifications

Our experts understand the challenges faced in early project phases and ensure only optimum solutions are taken forward through the project lifecycle for greenfield and brownfield projects.

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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.

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Case study: Hydrogen offshore

Understanding the opportunities available for delivering cleaner energy with hydrogen within offshore oil and gas.

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Article: CO2 storage offshore

Supporting the search for the next offshore carbon dioxide storage sites

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