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General enquiries
Tel. +45 7916 6666


Semco Maritime
Esbjerg Brygge 30
DK- 6700 Esbjerg

Maximum uptime for all assets

With more than 40 years of experience in Oil & Gas we are your guarantee for safe and cost-efficient operations and maximum uptime.

We specialise in projects for offshore operations

We supply everything from conceptual studies, design and procurement to construction and installation, and we specialise in solutions and projects for offshore operations.

Our experience in engineering and project management gives you the maximum value from your offshore assets – with minimum downtime.

Our engineers, technicians and operation support crew are trained in the health and safety standards of the oil and gas industry.

When your oil and gas assets need essential maintenance and repair, or redesigning , we will find the right solution and get the job done fast – without interfering with your operations.




Safe and cost-efficient Oil & Gas operations:


Our multi-discipline engineering teams cover mechanical, electrical, instrumentation, structural HVAC, piping and documentation. We incorporate relevant rules, regulations and third party approvals.

Construction and fabrication

Excellent fabrication facilities specialised in primary and secondary steel. We design, purchase, fabricate and test modules, systems, skids, piping, steel structures for final delivery, offshore commissioning and start-up.

Installation and commissioning

We handle all stages of installation, hook-up and commissioning. Experienced project managers makes sure that your project is delivered as agreed and we supply the people needed to complete your project on time.

Service and maintenance

While you focus on your business we will make sure that your assets and installations are performing at their best. We offer the full range of specialist services within electrical, telecom, mechanical and structural engineering. 

Asset management

Let us do design, plan, prepare work packages, fabricate, etc. onshore and afterwards we use our operation support crew to execute the projects safely offshore. 

Projects and campaigns

We handle all sizes of projects. From international EPCI projects to smaller local projects. We also coordinate and  perform campaigns on all offshore assets to service your PSV valves, firefighting systems or all electrical systems.

Yards and facilities

Our yards and facilities around the North Sea make sure that we are always close to our customers. Your rig is is never far from a yard and we make sure that you are back in operation fast – and in better shape than ever!

Component sales

Specialising in industrial and EX components

When operating in harsh, remote environments, particularly offshore, it is crucial to have the right components on hand. And if they are not in stock, you need to be able to get hold of them quickly.

We work closely with trusted manufacturers to ensure that we deliver the right product, on time – every time.

From audible and visual signalling equipment: Loudspeakers, sounders, beacons and telephone systems to offshore cables, cable transits, glands, lighting and junction boxes, we offer all the electrical and instrumentation installation packages for your operations in hazardous areas. 

Our technical sales team are always ready to share their knowledge and industry expertise.


Our in-house telecom specialists design your solution based on factors such as the capacity, functionality, distance and physical environment at site in question.

We supply a broad range of transmission and data communication solutions, and we always integrate our systems into packages that are easy to use, simple to service and inexpensive to maintain.

Service and maintenance

A flexible service concept is your guarantee that you will get a service agreement that fits your needs.

From simple ad hoc service based on time and material to full scope asset lifetime service agreements where we offer low fixed prices on selected services and spare parts

Manpower and operation support

The right people to operate, service and maintain your asset

Our resources are highly qualified, professional and cost-efficient. We adapt to your needs through hassle-free up and down-scaling. We mobilise people with short notice 24-7-365.

We have been ensuring maximum uptime for our customers' Oil & Gas assets for the past 40 years!

We also have a specialist who can help you!