
Originally supporting the shipping markets, Marine Service International has expanded its operations to become a major supplier of steel and coating repairs and refits for the offshore oil and gas industry. MSI is part of U.S.-owned Muehlhan Group, a market leader with international diversified operations stretching across multiple industrial market segments.
MSI specializes in onboard FPSO and offshore drilling installation projects. As one of the first service companies of this kind, MSI gained ISO 9001 certification with DNV in 2004, and our quality management program continues to strengthen our worldwide activities.
ISO certified by DNV since 2008, we have a solid safety record, with multi-skilled specialist teams on-call around the globe, ready to handle projects of any size. Since 1995, MSI has maintained 500+ vessels while in-service, reducing the workload during dry-dock.
MSI has exemplary safety records. Continuous investment in health and safety training for our teams ensures safe and reliable operations in even the most challenging working environments. The safety of people and client assets is our priority.
Our multi-skilled teams train continuously and maintain the required permits and certifications for global operations. We are approved contractors for marine repair activities by many major oil companies.

Marine Service International AS is an Operator Member of IRATA International, the world’s leading authority on industrial rope access.
MSI is also certified network as supplier to our clients such as:




Health, Safety, Quality and Environment
The safety of people and client assets is always our priority
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