About Marinum
A group of specialists for ports, harbours and maritime infrastructure.
Who we are
Marinum is a group of entrepreneur-led companies serving ports, harbours and maritime infrastructure. We work with customers such as ports and harbours, shipping and transport companies, construction contractors, energy and utility companies, municipalities and national agencies.
Each company is a specialist in its field, from towage and marine assistance to commercial diving, underwater inspection and quay construction. Working together, they deliver anything from a single inspection dive to complete marine works under one contract.
Work at the waterline demands the right vessels, platforms and certified people. Our companies bring all three, with short decision paths and safety first on every assignment.
Our ambition is to build the leading maritime infrastructure services group in the Nordics, and to extend it strategically into the rest of Europe. We grow organically and through acquisition.
Why customers choose us
Delivery you can plan around
Work at the waterline is safety-critical and time-critical. Our customers rely on us to deliver to plan, even in demanding conditions.
Safety first
A strong safety record and certified crews and divers on every assignment.
Certified and approved
The certifications, port approvals and track record that complex public and private assignments require.
Local knowledge, fast response
Crews and vessels based where the work is, with decades of knowledge of local ports and waters.
Built by the people who do the work
Our companies are led by founders and managers with decades on the water. Marinum was formed to give them a platform to grow on, without taking away what made them successful.
Work in the water follows the seasons. Diving and construction peak in the open-water months, while towage and harbour icebreaking keep ports running through winter. Together, our companies keep crews and equipment working all year.
Why entrepreneurs join Marinum2026
Founded
~60
Employees
3
Companies
1
Country