What Cegelec CEM does

Cegelec CEM is a French nuclear engineering contractor and equipment integrator headquartered in Montbonnot-Saint-Martin (Grenoble area), founded in 1993 and operating as a wholly-owned subsidiary within the VINCI Energies Nuclear Division. The company designs, manufactures, and commissions electromechanical systems for nuclear power operators, nuclear research institutions, and radioactive waste management organizations, spanning reactor pool liners, high-integrity cranes, hot cells, shielded systems, remote-controlled machines, and specialized welding services qualified to French nuclear codes (RCC-M, RCC-MX, ESPN).

Its core product portfolio is organized around four integrated offerings: nuclear systems engineering (~100 specialist engineers), turnkey process integration as prime contractor or consortium leader, operations in restricted environments (~100 certified operators for ionizing radiation work), and equipment integration including welding with an in-house welding school holding European qualifications. Underlying technology includes a proprietary PLM platform (GEDEX/GENOM), a collaborative virtual reality environment for design review and training, digital twin simulation with ALARA-based operational scenario planning, and an all-position automatic welding machine qualified for reactor pool liner fabrication.

Cegelec CEM generates revenue through B2B engineering services, turnkey construction contracts, and specialized equipment sales, primarily won via competitive tendering and consortium arrangements with large French and Belgian nuclear operators (EDF, CEA, ANDRA, ORANO, ONDRAF/Belgoprocess, ITER Organization). Pricing is negotiated per project and is not publicly disclosed; the model is enterprise field sales with no indirect channels. Visible programs include CIGEO Subsystem 1 (400,000 study hours), EDF fire detection renovation (1.2 million operational hours across up to 15 units), and ITER Tokamak heavy doors (50 units at 70 tonnes each). The company holds ISO 9001, ISO 14001, OHSAS 18001, and QUALIANOR certifications.

Name

Cegelec CEM

Legal name

Cegelec CEM

Website

https://cegelec-cem.fr

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

251–500 employees

Short description

Cegelec CEM is a French nuclear engineering contractor and equipment integrator serving EDF, CEA, ANDRA, ORANO, and ITER with design, manufacturing, commissioning, and maintenance of electromechanical systems for nuclear power, research, and waste management facilities.

Ownership category

akta.pro rank

Product category

Nuclear Engineering Services

NAICS

Nuclear Electric Power Generation (221113), Engineering Services (541330), Electrical Equipment Manufacturing (3353), Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Electrical Industrial Apparatus (3620), Electronic & Other Electrical Equipment (No Computer Equip) (3600), Power, Distribution & Specialty Transformers (3612), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Nuclear Plant EPC & Construction (EUAEAAAC)

akta.pro secondary industries

Power Plant I&C / SCADA / DCS EPC (EUAEAAAN), Power Plant Electrical Systems EPC (Switchyard, Transformers, Protection & Controls) (EUAEAAAM), Construction Environmental Management Plans (CEMP) & Permit Compliance Support (EUAHAAAF)

Keywords

• Nuclear engineering services
• Electromechanical equipment manufacturing
• Nuclear facility construction
• Radioactive waste handling
• Remote-operated nuclear machinery

Headquarters

HQ city

Montbonnot-saint-martin

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Supply Chain, Marketing or Sales

Revenue model

1. Engineering and Design Services: Engineering contractor services covering preliminary and detailed design studies, calculations, 3D modeling, and systems engineering for nuclear projects. Provided as part of turnkey construction projects or standalone engineering engagements.
2. Turnkey Construction and Equipment Integration: Design-builder and equipment integrator services for nuclear facilities, encompassing design, construction, commissioning, and maintenance. Revenue generated through large-scale project contracts and consortium arrangements with major nuclear operators.
3. Specialized Equipment Manufacturing: Design, manufacture, and installation of specialized electromechanical equipment including cranes, remote-controlled machines, shielded systems, and hot cells for nuclear environments.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Cegelec CEM designs, builds, and integrates electromechanical systems and specialized equipment for nuclear power operators, research institutions, and waste management organizations. The company delivers turnkey engineering, construction, equipment manufacturing, and on-site operations in restricted/radioactive environments, covering reactor pool liners, cranes, hot cells, shielded systems, remote-controlled machines, and welding services across France and Belgium.

Product overview

Cegelec CEM is a nuclear engineering contractor and equipment integrator that operates as a single unified product portfolio rather than a platform-plus-modules architecture. The company provides comprehensive nuclear sector services organized around core offerings: Nuclear Engineering (systems engineering and design), Process Integration (turnkey project management), Operations in Restricted Environments (maintenance and installation), Equipment Integration (qualified sensitive equipment), Scientific Facilities (CEA research installations), General Facilities and Processes, Waste Recovery Equipment, Handling Systems, Remote-Controlled Machines, Hot Cells and Shielded Systems, Reactor Pool Liners, and Welding services. A supplementary digital innovation offering includes Collaborative Virtual Reality for training and design reviews. These products are interconnected through a systems engineering approach where engineering designs feed into construction and integration activities, with virtual reality used across multiple services for training, simulation, and safety preparation.

Differentiator

Problem solved

Functional benefit

Brands

• STEP: STEP (Services Transverses à l'Exploitation du Parc) is a shared service initiative of VINCI Energies Nuclear Division's Mechanical Division, combining expertise from Cegelec CEM, Tunzini Maintenance Nucléaire, and Kellal Maintenance to address nuclear plant operation challenges including engineering, tooling, teleoperated equipment, and maintenance.

Products and services

• Nuclear Engineering (Ingénierie Nucléaire) Systems engineering services providing turnkey contractor vision with over 100 engineers designing equipment, specialized tools, and complex facilities for the nuclear sector, covering mechanics, electromechanics, electrical systems, instrumentation, control systems, nuclear engineering, and mechanical calculations.
• Ensemblier Process (Process Integration)

Quantifiable outcome

• Upgraded more than 200 cranes rated at 5–150 tonnes (open and closed chain) for regulatory compliance
• +4 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core.

• STEP (Services Transverses à l'Exploitation du Parc)coreStrategic or Co-development PartnerSTEP is a consortium response from the VINCI Energies Nuclear Division's Mechanical Engineering business line, combining complementary expertise from Cegelec CEM, Tunzini Maintenance Nucléaire, and Kellal Maintenance to address nuclear fleet exploitation challenges including upstream engineering, lifting system obsolescence treatment, teleoperated tooling design, operational maintenance, regulatory compliance, and mixed reality training via VIZU. STEP is organized by geographic zones across France (Nord-Ardennes, Nord-Est, Centre-Est, Sud-Est, Sud-Ouest, Centre-Ouest, Nord-Ouest) with dedicated contacts for each region.
• CIGEO Subsystem 1 Consortium (Cegelec CEM-led, 3 companies)coreStrategic or Co-development PartnerCegelec CEM leads a consortium of three companies as prime contractor for Subsystem 1 ('nuclear process for handling disposal packages') at ANDRA's CIGEO project, covering preliminary and detailed design studies for surface and underground nuclear package handling and disposal systems. The consortium represents 400,000 hours of studies and is one of the largest French nuclear construction contracts over the next 10 years.
• Cegelec CEM-Sommer Consortium (ITER)coreStrategic or Co-development PartnerThe Cegelec CEM-Sommer consortium, led by Cegelec CEM, is responsible for designing, manufacturing, and installing the 50 heavy doors for the ITER Tokamak vacuum vessel. Each door weighs 70 tonnes and serves radiological protection, confinement, impact protection, fire protection, and magnetic field resistance functions.
• ICEDA Facility Consortium (EDF Bugey)coreStrategic or Co-development PartnerAs part of a consortium, Cegelec CEM was responsible for the high-integrity handling process for transferring waste packages from the receiving area to storage cells at the ICEDA activated waste conditioning and storage facility at EDF Bugey NPP. The ICEDA facility serves as an interface between EDF nuclear power plants and ANDRA's final disposal facility.
• VINCI Energies Nuclear DivisioncoreOthersCegelec CEM is part of the VINCI Energies Nuclear Division, which comprises approximately 1,900 people across multiple companies. The division provides a network of around 1,000 operators certified for ionizing radiation work, 450 site electricians, and 250 mechanics that can be mobilized on projects. Cegelec CEM also benefits from VINCI Energies Academy (700 training sessions per year), La Factory innovation forum, Leonard intrapreneurship program, and Safety Excellence initiative.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Endel (Engie Solutions): ENGIE subsidiary providing industrial maintenance and nuclear services including decontamination, dismantling, and mechanical operations for EDF and other French operators. Overlaps Cegelec CEM's restricted-environment operations segment.
• Onet Technologies: French nuclear services group providing decontamination, dismantling, waste management, and engineering services to EDF, CEA, ORANO, and ANDRA. Closest direct comparable in scope and customer base to Cegelec CEM.
• SPIE Nucléaire: Subsidiary of SPIE providing nuclear facility maintenance, modification, and engineering services to EDF and CEA. Competes for the same electromechanical and I&C scopes on the French nuclear fleet.
• Assystem: French-headquartered independent engineering group with a dedicated nuclear division (Assystem Nuclear & Embedded) covering engineering services for ITER, EDF, CEA, and international nuclear programs. Directly comparable engineering-services peer.
• Nuvia: European nuclear engineering and services specialist (VINCI sister-company within VINCI Energies Nuclear Division in part). Operates in radiation protection, waste management, and nuclear facility support, overlapping Cegelec CEM's restricted-environment operations.
• REEL: French specialist in complex handling and lifting systems for nuclear, defense, and energy markets, including nuclear-qualified cranes and manipulators. Closest specialized competitor to Cegelec CEM's Manutention Sécurisée line of business.
• Ortec Group (Ortec Nuclear): French engineering group with a dedicated nuclear division providing engineering, decontamination, waste management, and radiological protection services to EDF, CEA, ORANO, and ANDRA. Direct comparable on waste-handling and dismantling scopes.

Broad incumbents

• Framatome: EDF-owned nuclear reactor OEM and services provider covering new-build, fuel, and installed-base services. The dominant French nuclear EPC and direct competitor on EDF fleet work, with broader scope and balance sheet than Cegelec CEM.

Emerging players

• Robatel: French specialist in shielded cells, shielded containers, and nuclear equipment for fuel cycle, research, and medical applications. Comparable in shielded-systems and hot-cells scope, smaller scale than Cegelec CEM.

Regional players

• SDMS: French nuclear equipment manufacturer specializing in mechanical handling equipment, fuel transfer systems, and specialized tooling for nuclear facilities. Comparable niche equipment manufacturer competing on similar EDF/CEA scopes.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/cegelec-cem-vinci-energies

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Cegelec CEM