What we do

Challenge

With more than 100,000 motorists driving through the existing Coen Tunnel in Amsterdam every day, the tunnel had become a traffic jam blackspot. The congestion was only set to get worse if nothing was done. Therefore, the Dutch government decided to create more capacity to alleviate the problem.

The Second Coen Tunnel is an immersed tunnel under the North Sea Canal, beside the existing Coen Tunnel. The tunnel consists of three permanent lanes towards Zaanstad and two other lanes, which can be used in either direction depending on the intensity of the traffic.

Solution

DEME is part of the Coentunnel Company, the consortium awarded the Second Coen Tunnel project.

Used technology

Hammers / vibration blocks

Cranes / piling rigs

Pontoons

Our scope included:

Financing the entire project
Design and build of the new tunnel, based on a functional Set of Requirements
Renovation of the existing Coen tunnel
Design and construction of roads leading to the existing system, with bridges and other infrastructure
Construction of ponds, banks and culverts and arranging the permits
Maintaining the above-mentioned scope for 30 years

Related jobs

All jobs

Warehouse Officer (temporary position)

Als laatste schakel in het logistieke proces zorg je als Warehouse Officer voor de correcte verzending van scheepsonderdelen en verbruiksgoederen naar onze vloot over heel de wereld.

Je plant samen met de transportafdeling de bevoorrading van de schepen via air, road en sea-transporten. Hierdoor sta je in nauw contact met de technische dienst van de schepen, onze interne transportafdeling en de arbeiders die de goederen klaarmaken voor verzending.

Flexibiliteit, communicatie en planning zijn key in deze functie.

DEME General

Supply Chain / Procurement

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Finance Manager Indonesia

Do you want to turn challenges into opportunities and explore new horizons ? Interested in becoming our new Finance Manager for our Indonesian branch & projects?

DEME is a global solutions provider in a challenging and rapidly changing world and a world leader in the highly specialized fields of dredging and land reclamation, solutions for the offshore energy market, environmental and infra marine works.

Our expertise and vast experience has been deployed over the centuries for Dredging, Environmental and Marine Engineering business solutions such as: port construction and improving maritime access worldwide. We have been creating land for 140 years and will continue to do so in the future.

Therefore we are looking for motivated candidates to reinforce our Finance department at our office in Jakarta.

DEME General

Finance

Worldwide

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Immersion Specialist

As an immersion specialist, you will be part of the team responsible for floating and positioning concrete tunnel elements or caissons, equipping them in the port, transporting them from temporary storage locations to the offshore site, and installing them at sea.
In the preparatory phase, you will be involved in the development of operation manuals, work plans, and coordination between teams to ensure smooth execution. In the operational phase, you will be part of the team that performs the immersion activities, ensuring the correct positioning of the elements or caissons on the seabed.

Infra

Engineering

Worldwide

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Insurance Administrator

DEME is a global solutions provider in a challenging and rapidly changing world and a world leader in the highly specialized fields of dredging and land reclamation, solutions for the offshore energy market, environmental and infra marine works.

DEME’s Legal Department, situated at DEME’s headquarters in Antwerp (Belgium) and consisting of an extensive and complimentary team of in-house legal and insurance counsels, is looking for a detail-oriented and organized Insurance Administrator to join its team.

In this role, you will be responsible for managing insurance policies, ensuring compliance with industry regulations, and providing excellent support to clients and internal teams. The ideal candidate will have strong administrative skills, a customer-focused attitude, and a solid understanding of insurance processes and terminology.

DEME General

Admin & Support

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Apprenticeship Office Management

Apprenticeship Office Management - Start 01/08/2025

Dredging

Internship & Student

Germany

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Tender Manager Subsea Cables

As a Commercial Manager or Tender Manager, you will be responsible for analyzing international tenders and commercial opportunities and managing corresponding project proposals for complex offshore works. Under your leadership, your team shall analyze the project scope, and develop the engineering, the planning and the pricing.

As central point of contact you will establish strong relationships with (potential) clients during the whole process. You will lead and manage a tender team through application of our tender and acquisition processes; you will motivate and empower your tender team members from the various DEME Offshore specialists support departments, such as Engineering, Legal, Insurance, Finance, Project Controls. Through facilitating excellent team communication and efficiency, you will support ownership and maximize innovation, targeting a high-quality tender submission and contract. Finally, you and the tender sponsor will take the lead in tender clarifications and negotiations with clients after the submission of the tenders.

This position is based at our DEME Offshore Office in Breda, The Netherlands.

Offshore

Tendering

Netherlands

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Geotechnical Engineer

Qualitative execution of reclamation areas, ground improvement works, foundation constructions and ground retaining structures such as quay walls can only be guaranteed by first class design, execution planning, follow-up and checking/witnessing. Finally, this needs to be demonstrated by quality control testing and reporting to the employer.

The geotechnical engineer assists the tender team to recognize and solve all geotechnical related issues, both in tender stage as in execution stage. This will require full understanding of the requirements, translation into geotechnical requirements and geotechnical designs.

In execution stage, geotechnical engineers assist the project team to solve all specific geotechnical issues. This can be as on-site geotechnical engineer or from the DEME head office in Zwijndrecht

Dredging

Engineering

Belgium

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Project Development Engineer / WTG - Offshore Wind

DEME Concessions offers integrated capabilities, bringing together state-of-the-art expertise and top partners to focus on useful and economically viable long-term projects in the ports and maritime, offshore wind, green hydrogen and infrastructure sectors that benefit concession owners, users and private-sector partners alike.

Epitomising DEME’s concession-construction model, DEME Concessions is committed to the DEME Group’s values of social and environmental responsibility towards all its stakeholders, and to its on-going endeavour to make a sustainable contribution.

To support its expanding activities DEME Concessions is looking to strengthen its Engineering Team with a Project Development Engineer / Wind Turbine Engineer. You will be based at the head office of the DEME Group in Antwerp, and be directly involved with multidisciplinary project development teams. From within the Deme Concessions Engineering Team you report to the Engineering Team Manager and liaise closely with the respective Business Development Managers for project specifics.

DEME General

Engineering

Belgium

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