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Tel. +45 7916 6666


Semco Maritime
Esbjerg Brygge 30
DK- 6700 Esbjerg

About us

We are in the business of energy.
And we are here to change it. Together.

Global energy transition:

Before "either or" comes "both"

To fulfill the vision of a fossil-free future, we need conventional and renewable energy sources to coexist effectively until the day when renewables can fully keep the world running. And since Semco Maritime is deeply rooted in the challenges of both the conventional energy sector and the offshore wind industry, we are in a unique position to bridge today's and tomorrow’s solutions. Driven by the challenge. Powered by innovation. And building on 40 years of dedication.

So while most people know why a  sustainable energy transition is vital, we put our hearts and minds into the journey itself. How to get there. Constantly seeking clever and pragmatic ways to realise global energy ambitions and reach the next destination. And the next one after that.

Safe and cost-efficient

Turnkey solutions for our customers

From turnkey engineering solutions to outsourcing of personnel and delivery of components, systems and solutions – Semco Maritime makes sure that customers and partners in the energy sector experience safe and cost-efficient solutions. Semco Maritime has approx. 2,000 employees and branches in Denmark, Norway, the UK, Germany, Poland, Singapore and the US.

Core competences:

Renewable energy

  • Engineering studies and concepts
  • Offshore substations (electrical EPCI)
  • Service, operation and maintenance
  • Firefighting and telecom
  • Manpower

Bridging today's and tomorrow’s energy solutions

A fossil-free future calls for a sustainable energy transition where conventional and renewable energy sources coexist effectively until the day when renewables can fully keep the world running.

Over the past 40 years, we have built up expertise as a multi-disciplined engineering, procurement and construction (EPC) contractor to the oil and gas industry and to this day we still make sure that oil and gas assets in the North Sea experience maximum uptime and smooth operation.

In 2001, Semco Maritime ventured into the offshore wind industry and is now also a well-known »world leader in offshore substations«. Since then we have provided competitive turnkey offshore wind electrical infrastructure solutions for more than 20 offshore substation projects. In the years to come, this experience will also be applied to the developing offshore wind markets in both Taiwan and the US.

How we are organised

Find out how we are organised at a Senior Management level. We are 4 top-tuned divisions specialised in each their own area - but working closely together across to make sure that our customers experience seamless cooperation across all phases of their projects!

From stove manufacturer to global project engineering

It all started in 1888, when Semler & Mathiassen, a castings and stove manufacturer opened for business. The company expanded rapidly, and ventured into new areas. But it wasn’t until 1945 that we began producing high-quality technical installations for the marine and ship-building industry.

In 1980, the company we know today, was born with the establishment of our first offshore business unit in Esbjerg. Since then, organic growth and acquisitions in Denmark, Norway and the UK have given  Semco Maritime the capacity to handle even the largest of projects.

Today, we aim to be close to our global customers, and we have therefore established sales and service offices around the world. Find locations

Across the Semco-organisation we are a united team of highly qualified people dedicated to meeting customer expectations in projects, solutions, and manpower for the energy sector all over the world.

Milestones and memories

Just a few of many important events from the past 40 years

1980 - 1998
We established our first offshore business unit in Esbjerg in 1980 providing project engineering, maintenance and manpower services for the North Sea.
2000 - 2006
Semco Maritime is certified according to OHSAS 18001 and ISO 14001. Esbjerg Oilfield Services is acquired and integrated in full with existing activities.
2007 - 2010
We acquired Secure Systems ApS and becomes Premier Cisco Partner. Semco Maritime takes over the project engineering department of Delpro A/S.
2011 - 2016
Acquisition of Danish Rope Access. New headquarters in Esbjerg, Denmark. Hanøytangen near Bergen is also acquired and completes the North Sea Triangle.
Semco Maritime TODAY
A more balanced distrbution between the the two business areas, Renewables and Oil & Gas, is achieved while safe and innovative project completion keeps us "first choice" among customers and employees.

Safety is part of our DNA

Semco Maritime sets ambitious objectives and targets in order to progressively achieve an HSEQ performance that adds value to the company and its stakeholders.

The goal is clear:

  • Zero harm to employees
  • Zero harm to the environment
  • Zero harm to stakeholders
  • Zero harm to our assets