Omexom Nuclear Projects

Implantation

Omexom Nuclear Projects

Contact

52-58 av. Jean Jaurès, 92700 Colombes

Other locations :
Bâtiment Le SUNWAY
257-259 Av. Jean Jaurès, 69007 Lyon

ISDEL ENERGY LIMITED (a Vinci Energies company)
160 Aztec West, Park Avenue,
Almondsbury, Bristol BS32 4TU, UK

Contact us

Who we are ?

Omexom Nuclear Projects (ONP) is the business unit of the Nuclear Division of Vinci Energies dedicated to the electrical installations of the EPR, EDF’s Nuclear new build program.
Our vocation is to design and build the electrical installations of these new Nuclear Power Plants in accordance with the required quality and nuclear safety standards.
The business unit is based in Colombes, close to Paris, but can also rely on its locations in Lyon and Bristol (UK) to address our international projects.

The business unit has been involved in nuclear projects for more than 15 years now. After the finalizations on the Flamanville EPR and the ramp-up on the HPC project (2 units at Hinkley Point C in the United Kingdom), the path for Omexom Nuclear Projects promises to be just as exciting in the years to come: Nuclear new build projects are being implemented (EPR2, Sizewell C in the UK) and ONP will be there to support them! By putting in the forefront our women and men as well as Nuclear Safety!

LEPINAY Guillaume BU Manager

Key figures

collaborators

M€

Turnover

years

of expertise

Major references

Flamanville EPR, Hinkley Point C EPR (UK), Activated waste conditioning and storage facility (ICEDA)

Our expertises

Our engineering specialities are:
- High & low voltage – single line diagrams, sizing, technical specifications
- Installation of equipment and cable trays & cable routing (IEG & IED)
- Seismic stress resistance calculations (supports, etc.)
- Design & manufacturing of electrical cabinets & boxes
- K3 qualification of equipment
- Fire detection (JDT), CCTV/PA, access control, lighting (IED)
- Instrumentation & Control’s – architectures, functional analyses, specifications
The business unit also has strong expertise in Site Management & Construction:
- Logistics
- Sourcing
- Sub-contractors management
- Scheduling
- Co-activity management

Our jobs

Project Director,
Project Manager,
Project Controls Manager,
Design Engineer, CAD Designer,
Planning Engineer,
Construction Manager,
QHSSE Manager,
Tender Engineer, etc.

Join us by applying directly on jobs.vinci.com and following us on LinkedIn.

Join us!

YR5301 – IEG FA3 (Flamanville 3) EPC contract (including K3 qualification)

– 2.500 drawings, specifications & other documents
– 150km of cable trays
– 2.200km of cables
– 63.000 terminations
– 3.000 cabinets & boxes
– 5 turnkey systems
> 1.000.000 engineering manhours
> 5.500.000 site manhours

ICEDA

Control systems, supervision of waste container handling
Engineering and installation of cable trays and seismic supports
Design and installation of electrical cabinets according to nuclear requirements
Radiation protection studies
Fire detection system, communication, video surveillance, access control (C2 EVEREST detection gate, CPO SMART, etc)…

HK5301.01 – IEG HPC Manufacturing & execution design

Scope :Design, qualification & support to site activities

– 200km of cable trays

– 60.000 supports

– Earthing & bonding

– Pre design for electrical cabinets & boxes

– Turnkey systems (KSC, LYS, LAI)

> 360.000 manhours at 2022 end

290.000 engineering manhours

70.000 project controls, quality & project management manhours

HQSE

Nuclear safety : ISO 19443
Quality : ISO 9001
H&S : ISO 45001
Fire detection : APSAD I7
Radiation protection : certification Qualianor
Qualified by UTO (EDF supply chain management)
CSR (Corporate social responsibility) : Afnor ISO 26000

17/09/2025 Cameroon, Territories

Omexom Cameroon and City of Yaoundé Launch Smart Solar Lighting Project for a Sustainable Future

Omexom Cameroon, in close partnership with the Urban Community of Yaoundé (CUY), officially launched a pilot renewable energy project to modernize the city’s public lighting system. This ambitious initiative marks a major step forward in Cameroon’s energy transition, combining solar power, smart grid technology, and energy storage to enhance sustainability and urban resilience.

11/09/2025 Energy Transition, Substations, Substations, UK & ROI, Germany, Norway

SF₆-Free Substations: Omexom Business Units Implement Sustainable Innovations for a Greener Grid

As the demand for clean energy grows, the electrical infrastructure industry is embracing innovative solutions to reduce emissions. SF₆, a widely used greenhouse gas in electrical switchgears at substations, is under scrutiny due to its exceptionally high global warming potential (GWP), more than 24,300 to 25,200 times (*IPCC AR6 data) that of CO₂.

15/02/2024 Norway

Norway: Otera AS celebrates rebranding, joins Omexom network

On February 2, Omexom in Norway welcomed close to 300 new colleagues with a rebranding event spread in the locations of Kristiansand, Lyngdal, Evje and Møre.

30/10/2023 Overhead transmission lines, Substations, Sweden

Omexom in Sweden starts construction on three major projects, marks milestone in collaboration with both TSOs and DSOs

The Omexom business unit in Sundsvall has secured three new contracts with a total order amount of €70 million. Building on long-standing partnerships with clients Svenska kraftnät and Sundsvall Elnät AB, the projects include the reconstruction and new construction of Odensala which is the largest air-insulated switchgear in Sweden so far.

21/08/2023 Environment, Sweden, Underground distribution lines

Omexom in Sweden reduces environmental impact in distribution project

‘Groundbreaking’ takes on a new meaning at an underground distribution site for Omexom in Sweden: the business unit and its project partners have inherently redesigned the project to adopt a comprehensive environmental approach.

31/05/2023 Distribution, Finland

Eitech and Omexom sign contract for major power distribution project in Finland

Eitech in collaboration with Omexom has won the assignment to deliver and install the entire power distribution in an extensive infrastructure project in Finland. The large and complex project will begin in 2023 and will last for almost two years with completion scheduled by spring of 2025.

20/04/2023 New Zealand

New Zealand: Electrix rebrands to Omexom

This April, New Zealand energy services contractor Electrix begins operations under its new name, Omexom. Founded in New Zealand in 1955, Electrix established itself as a leading provider of engineering, construction, and maintenance services to asset owners in the electricity and gas utility, industrial, commercial, resources, and infrastructure sectors.

05/04/2023 Belgium, High voltage, Substations

Omexom Belgium refurbishes Noordschote substation

Located in a rural village of only 600 inhabitants, the Noordschote high-voltage substation is an important node in its area as it supplies the entire Westhoek region with electricity. To prepare for higher electricity demands in the future, Omexom in Belgium is modernising the installation, making it more sustainable.

24/01/2023 Distribution, Finland, Transmission

Omexom broadens its activities in Finland by welcoming TLT-Building and TLT-Connection

VINCI Energies acquired two multi-technical companies providing global solutions for electrical and telecommunication network operators in October 2022, and is accelerating their integration with two rebrandings: TLT-Building and TLT-Connection activities in transmission and distribution join Omexom in Finland, while TLT-Connection telecommunication business becomes Axians.

29/11/2022 Portugal, Power, Solar

Ready for takeoff: Omexom in Portugal finishes first Portuguese solar farm at Faro airport

The only international airport in the Algarve region, Faro welcomes about 9 million passengers yearly. Starting this summer, the airport, operated by VINCI Airports, is expected to self-produce 30% of its energy needs with solar energy and save an equivalent of 1,500 tons/ year of CO2 thanks to its solar farm. The Faro Airport project exemplifies the strength of the VINCI companies’ network, spanning various expertise, including that of Omexom in Portugal.

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