Siem Offshore Contractors
Our Ships. Our People. Our Vision.
Your Solution.
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  • Siem Offshore Contractors becomes part of Subsea 7

    06. March 2018 - Siem Offshore has entered into an agreement with Subsea 7.

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  • ISV Siem Moxie to Support the Rentel Offshore Wind Farm Project

    13. November 2017 - Supporting the completion of the inner array grid cable installation scope

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  • Siem Moxie begins Work

    31. Aug 2017, ISV Siem Moxie begins work on the HyWind Scotland floating wind farm

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  • Siem Offshore Contractors Signs Contract

    13. July 2017 - SOC Signs Contract for the Provision of Termination and Testing Services with JDR Cable Systems for the Beatrice OWF

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  • 1084
    submarine cables installed
  • 141352
    walk to work
    personnel transfers
  • 321
    wind turbine generators
    connected and counting

Leading the way in cable installation innovation

Siem Offshore Contractors is a leader in submarine cable installation, repair and maintenance serving the global offshore renewable energy and oil and gas sectors as well as utility markets since 2003.

We combine two decades of in-house cable installation experience with best practice and latest vessel technology to operate in harsh environments 24/7 minimising weather delays. Learn more about us

Offshore Wind Farm inner array grid cable installation on the Nordsee One OWF project as executed by Siem Offshore Contractors during the summer of 2016. The submarine cable installation was performed using the leading Siem cable installation Duo (Siem Aimery - Cable Lay Vessel and Siem Moxie - Installation Support Vessel).