# Jan De Nul Group — Offshore energy, subsea cables, dredging and civil construction

> Jan De Nul Group is a Belgian family-owned contractor active in offshore energy, dredging, civil construction and environmental services. Its offshore business undertakes EPCI and balance-of-plant contracts for wind farms, foundations, cable systems and grid connections. Jan De Nul may lead or participate in consortia, while turbine, cable-manufacturing and owner roles can belong to other parties; the references below state the disclosed scope.

- **Legal name:** Jan De Nul Group
- **Headquarters:** Aalst, Belgium
- **Founded:** 1938
- **Official website:** [Jan De Nul Group](https://www.jandenul.com)
- **URL:** https://voltformer.com/epc-contractors/jan-de-nul
- **Markdown:** https://voltformer.com/epc-contractors/jan-de-nul.md
- **JSON:** https://voltformer.com/epc-contractors/jan-de-nul.json

## CEO and leadership profile

### Julie De Nul

Chief Executive Officer

Became CEO of Jan De Nul Group in 2023. She represents the sixth generation of the family enterprise; the company’s official history highlights her focus on its people and employee development.

- **In role since:** 2023
- **Sources checked:** 2026-10-04
- **Profile:** [Julie De Nul](https://voltformer.com/ceo/julie-de-nul)

[Jan De Nul · Company history (CEO appointment)](https://www.jandenul.com/history) · [Jan De Nul · Company profile](https://www.jandenul.com/sites/default/files/2020-08/Company%20Profile%20Jan%20De%20Nul%20Group%20%28EN%29.pdf)

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## Engineering specializations

- Offshore wind foundations and balance of plant
- Subsea export and inter-array power cables
- Offshore substations, installation and grid connections
- Dredging, civil construction and environmental remediation

## Declared capabilities

- **Basic and detailed engineering:** Listed capability; confirm project-specific scope
- **Procurement and supply:** Listed capability; confirm project-specific scope
- **Civil and structural construction:** Listed capability; confirm project-specific scope
- **Testing and commissioning:** Listed capability; confirm project-specific scope
- **High-voltage substation EPC:** Listed capability; confirm project-specific scope
- **Transmission lines:** Listed capability; confirm project-specific scope
- **Turnkey power plant EPC:** Not listed
- **Grid interconnection:** Listed capability; confirm project-specific scope

## Representative projects

### Formosa 1 Phase 2 offshore wind farm
- **Capacity / scope:** EPC foundations for 20 turbines; design, purchase and installation of 17 inter-array and 3 export cables; 12 km onshore cable trench
- **Country:** Taiwan | **Client:** Formosa 1 Wind Power Co. Ltd. | **Year:** 2019
- **Description:** Jan De Nul completed this EPCI scope in 2019: foundations, scour protection and cable systems. The 20 turbines in phase 2 added 120 MW to the two-turbine, 8 MW demonstration phase; turbine supply belonged to other parties.
- **Technologies:** Offshore wind, Monopile foundations, Inter-array cables, Export cables
- **Original source:** [https://www.jandenul.com/news/landmark-achievement-jan-de-nul-asia](https://www.jandenul.com/news/landmark-achievement-jan-de-nul-asia)

### Taiwan Power Company Offshore Wind Farm Phase 1
- **Capacity / scope:** Consortium EPCI for 21 × 5.2 MW turbines and full balance of plant; Jan De Nul’s scope included foundations, vessel provision, cables and onshore substation upgrade
- **Country:** Taiwan | **Client:** Taiwan Power Company; Jan De Nul–Hitachi consortium | **Year:** 2021
- **Description:** The consortium held the overall EPCI contract. Jan De Nul describes its own balance-of-plant and electrical scope; Hitachi manufactured, assembled and installed the turbines. Five-year O&M was assigned to the consortium after delivery.
- **Technologies:** Offshore wind, Jacket foundations, Offshore and onshore cables, Substation upgrade
- **Original source:** [https://www.jandenul.com/our-projects/offshore-windfarm-changhua-taiwan](https://www.jandenul.com/our-projects/offshore-windfarm-changhua-taiwan)

### Princess Elisabeth Island to onshore grid cables
- **Capacity / scope:** Supply, installation and testing of three 220 kV AC subsea cables connecting island to Belgian onshore grid
- **Country:** Belgium | **Client:** Elia Transmission Belgium; consortium with LS Cable & System | **Year:** Contract awarded 2024; delivery in progress
- **Description:** Jan De Nul and LS Cable & System jointly won the cable contract. This is an electrical connection package distinct from TM EDISON’s construction of the island foundations.
- **Technologies:** 220 kV AC cables, Subsea export cables, Offshore grid connection, Renewable integration
- **Original source:** [https://www.jandenul.com/news/new-contract-connect-princess-elisabeth-island-belgian-high-voltage-grid](https://www.jandenul.com/news/new-contract-connect-princess-elisabeth-island-belgian-high-voltage-grid)

## Technical services

- **Offshore wind EPCI and BoP:** Engineering, fabrication coordination, transport and installation of foundations, cables and other balance-of-plant infrastructure.
- **Subsea cable delivery:** Design, procurement coordination, transport, installation, burial, protection and testing, directly or with cable-manufacturing partners.
- **Marine construction:** Dredging, reclamation, port works, coastal protection and offshore construction using specialized vessels.
- **Civil and environmental projects:** Large civil works and contaminated soil treatment alongside the group’s marine and energy activities.

## Standards and certifications



## Official contacts

- **Address:** Tragel 60, 9308 Hofstade-Aalst, Belgium
- **Official website:** https://www.jandenul.com/contact

## Reference statistics

- **Employees (company announcement, 2025):** More than 9,000
- **Founded:** 1938
- **Business heritage:** Family-owned, sixth generation

## Company and energy news

- [Jan De Nul orders second subsea cable-burying vessel](https://voltformer.com/news/jan-de-nul-new-cable-trenching-vessel-order-2026) — 2026-09-21 · [Markdown](https://voltformer.com/news/jan-de-nul-new-cable-trenching-vessel-order-2026.md)
- [First monopile installed at OranjeWind](https://voltformer.com/news/jan-de-nul-oranjewind-first-monopile-2026) — 2026-09-01 · [Markdown](https://voltformer.com/news/jan-de-nul-oranjewind-first-monopile-2026.md)
- [Foundations for Princess Elisabeth Energy Island completed](https://voltformer.com/news/jan-de-nul-princess-elisabeth-island-foundations-complete-2026) — 2026-08-20 · [Markdown](https://voltformer.com/news/jan-de-nul-princess-elisabeth-island-foundations-complete-2026.md)
- [Jan De Nul completes all 54 Inch Cape monopiles](https://voltformer.com/news/jan-de-nul-inch-cape-monopiles-completion-2026) — 2026-06-10 · [Markdown](https://voltformer.com/news/jan-de-nul-inch-cape-monopiles-completion-2026.md)
- [Vole au vent installs final turbine at French wind farm](https://voltformer.com/news/jan-de-nul-dieppe-le-treport-final-turbine-2026) — 2026-04-29 · [Markdown](https://voltformer.com/news/jan-de-nul-dieppe-le-treport-final-turbine-2026.md)
- [Jan De Nul develops method to install three cables at once](https://voltformer.com/news/jan-de-nul-tennet-cable-installation-method-2026) — 2026-03-06 · [Markdown](https://voltformer.com/news/jan-de-nul-tennet-cable-installation-method-2026.md)
- [23 caissons for energy island ready for installation](https://voltformer.com/news/jan-de-nul-energy-island-caissons-ready-2026) — 2026-01-29 · [Markdown](https://voltformer.com/news/jan-de-nul-energy-island-caissons-ready-2026.md)

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