| # | Company | Employees |
|---|---|---|
| 1 |
Bureau Veritasgroup.bureauveritas.com
A global leader in testing, inspection, and certification services, fostering confidence through expertise and independence while addressing crucial societal and environmental challenges |
55,072 |
| 2 |
ALTRADaltrad.com
Global provider of industrial services and equipment manufacturing, offering high-value solutions across energy, oil & gas, construction, and environmental sectors. |
52,000 |
| 3 |
Veoliaveolia.com
Global environmental services, building environmental security for public health, industry competitiveness. Cleans pollution, reduces carbon, regenerates resources through water, waste, energy solutions. |
49,296 |
| 4 | 26,423 | |
| 5 |
Eiffage Énergie Systèmeseiffageenergiesystemes.com
Designs, builds, operates, and maintains energy systems, offering innovative solutions in electrical, industrial, climatic, and energy engineering. |
15,518 |
| 6 |
EQUANSequans.com
A global leader in multi-technical services, providing customized solutions for building improvement and supporting sustainable development with a highly qualified team |
15,419 |
| 7 | 14,557 | |
| 8 |
Veolia | Water Techveoliawatertechnologies.com
Provides global water technology expertise, ensuring performance, sustainability, and resource protection for communities and industries through advanced solutions and services. |
13,064 |
| 9 | 12,741 | |
| 10 |
Equans Franceequans.fr
Designs, installs, and delivers bespoke solutions optimizing equipment and usage for businesses, local authorities, and industrial players in energy, industrial, and digital transitions. |
11,029 |
| 11 | 9,778 | |
| 12 |
SOCOTECsocotec.fr
Provides services throughout the entire life cycle of built assets for compliance, extended lifespan, improved performance, and people’s safety in construction, infrastructure, and industry. |
7,326 |
| 13 | 6,850 | |
| 14 |
Veolia | Franceveolia.fr
Provides specialized services for water management, waste treatment, and energy recovery to help cities and industries preserve, access, and renew essential resources. |
6,110 |
| 15 |
Bouygues Energies & Servicesbouygues-es.fr
Bouygues Energies & Services is a key player in energy and digital transition, focusing on sustainable solutions and workforce development |
5,960 |
| 16 |
Ortec Grouportec-group.com
Provides multidisciplinary services for industry, energy, and environment, including maintenance, new works, environmental services, facilities management, logistics, and engineering consulting. |
4,388 |
| 17 |
PAPRECpaprec.com
Transforming waste into raw materials, Paprec operates in 10 countries, collecting and processing industrial and municipal waste to create new secondary raw materials |
3,373 |
| 18 |
SADEsade-cgth.fr
Specialist in design, construction, and maintenance of networks and related infrastructure, with a focus on sustainable solutions and social responsibility Operating in multiple countries |
3,217 |
| 19 |
Dekra Francedekra.fr
Inspection, certification, risk management, audits, training, and consulting services for automotive, transport, industry, environment, and safety sectors. |
3,188 |
| 20 |
Veolia | Assainissement & Maintenance
Specialized in liquid waste sanitation, building hygiene, industrial maintenance, waste collection, and valorization across France with extensive agency network. |
3,065 |
| 21 |
VINCI Energies en France
Accelerating environmental transition in France by focusing on energy and digital transformations for factories, buildings, cities, and energy/transport infrastructure with innovative solutions |
2,953 |
| 22 |
idverde FRidverde.fr
Specializes in ecological landscaping, green space creation, maintenance, and innovative solutions supporting biodiversity and climate resilience across Europe. |
2,616 |
| 23 |
SPIE Citynetworksspie.fr
Design, implementation, operation, and maintenance of energy and digital networks, offering smart city services for local authorities and businesses. |
2,367 |
| 24 | 1,839 | |
| 25 |
ECOCERT Groupecocert.com
Assists stakeholders sustainable practices through certification, consulting, training across various sectors including agriculture, cosmetics, textiles, and fair trade. |
1,573 |
| 26 |
SARPsarp-assainissement.fr
Sanitation and industrial equipment maintenance, including cleaning, emptying, pumping, high-pressure cleaning, and network rehabilitation, with a focus on safety and innovation. |
1,549 |
| 27 |
DERICHEBOURG Environnementderichebourg.com
A leading European company offering comprehensive recycling and waste management services for industry, communities, and individuals, promoting a circular economy |
1,500 |
| 28 |
Groupe NICOLLINgroupenicollin.com
The company provides waste management, urban sanitation, and industrial cleaning services to local authorities and private companies, focusing on integrity, success, and loyalty |
1,476 |
| 29 | 1,448 | |
| 30 |
BTP Consultantsbtp-consultants.fr
Technical control, SPS coordination, and real estate diagnostics, with a focus on R&D, BIM, and off-site modular construction for various project needs. |
1,418 |
| 31 |
PROXISERVEproxiserve.fr
Provides innovative energy solutions for homes and buildings, specializing in heating, water, and electric vehicle charging, serving condominiums, landlords, and private customers. |
1,256 |
| 32 |
Groupe Challancinchallancin.fr
With over 90 years of experience, Challancin offers cleaning, security, and multiservice solutions across various regions in France with a revenue exceeding 200 million Euros |
1,242 |
| 33 |
SULO Groupsulo-group.com
It provides waste management services to local authorities and businesses, focusing on efficient and sustainable waste disposal and recycling solutions. |
1,097 |
| 34 |
SIS
A leading company in sanitation services (maintenance, control, rehabilitation) in the Grand Est region with 700 employees serving individuals, communities, and industries |
1,068 |
| 35 |
Rentokil Initial Francerentokil-initial.com
Pest control, hygiene solutions, cleaning, catering, interior landscaping, package delivery, and integrated facilities services for diverse customers. |
979 |
| 36 | 943 | |
| 37 | 937 | |
| 38 |
Séché Environnementgroupe-seche.com
Séché Environnement is a leading independent environmental services operator focusing on circular economy, waste management, and global pollution solutions with sustainable development values |
831 |
| 39 |
Antea Group - Franceanteagroup.fr
Provides environmental engineering and consulting services globally, focusing on water, industrial environments, infrastructure, and environmental data management for diverse clients. |
808 |
| 40 |
ONF Internationalonfinternational.org
Provides international forestry expertise, technical assistance, and training in natural forest management, climate projects, mapping, risk prevention, and biomass energy. |
791 |
| 41 |
CLS Group (Collecte Localisation Satellites)cls.fr
global pioneer providing monitoring and surveillance solutions for the Earth, managing resources sustainably using space-based technology and data processing. |
788 |
| 42 |
OTV Franceotv.veoliawatertechnologies.fr
Design and implementation of innovative water treatment and resource preservation solutions in collaboration with clients and partners for ecological transformation. |
781 |
| 43 | 781 | |
| 44 | 731 | |
| 45 | 717 | |
| 46 | 704 | |
| 47 |
Francilianeleaudiledefrance.fr
Manages drinking water service for 4 million users in 133 municipalities, handles water treatment, maintenance, network, quality control, and customer relations. |
694 |
| 48 |
ABER Propretéaberproprete.fr
Providing high-quality industrial cleaning and hygiene services with continuous employee training and precise service monitoring since 1975. |
682 |
| 49 | 668 | |
| 50 | 639 | |
| 51 | 635 | |
| 52 |
Sce Aménagement & Environnementsce.fr
Sustainable development firm offering urban planning, civil engineering, and environmental services globally with 45+ years of experience and 500 professionals |
625 |
| 53 |
SIDEMsidem-desalination.com
Specialized in large desalination projects, this Business Unit within Veolia Water Technologies provides EPC and O&M services for SWRO projects |
608 |
| 54 |
Apave Internationalapave.com
Provides inspection, training, testing, certification, and consulting services to manage technical, human, environmental, and digital risks across multiple industries. |
604 |
| 55 |
GROUPE PIZZORNO ENVIRONNEMENTpizzorno.com
Family-owned company specializing in waste management, including collection, sorting, recycling, and treatment to support ecological transition. |
603 |
| 56 |
Cabinet Merlincabinet-merlin.fr
Consulting and engineering services for water production, wastewater treatment, waste management, energy production, urban planning, and mobility for local authorities and industries. |
589 |
| 57 |
Biotopebiotope.fr
A leading French ecological engineering and nature conservation company with over 240 employees, 25 sites, operations in 40+ countries, and diverse services |
585 |
| 58 | 585 | |
| 59 |
Blue Pearl Energy Servicesbluepearlenergy.com
The platform brings together small & medium Energy Services companies to provide comprehensive energy efficiency solutions with long-term savings commitments |
577 |
| 60 |
Phenixwearephenix.com
European leader supporting businesses through bespoke consultancy and proprietary technology to reduce waste, manage surplus stock, and donate meals to charity. |
556 |
| 61 |
Groupe Brangeonbrangeon.fr
An independent family-owned company founded in 1919, specializing in transportation, logistics, recycling, and materials valorization, with a focus on innovation and personalized services |
553 |
| 62 |
Société du canal de provencecanaldeprovence.com
The company designs, builds, and operates environmentally-friendly hydraulic systems for water supply in the Provence-Alpes-Côte d’Azur region, also offering engineering services internationally |
546 |
| 63 |
BATISANTÉbatisante.fr
BATISANTÉ protects 100,000 properties in France against fire, pests, regulatory risks, and breakdowns, simplifying life for real estate professionals with expert services Visit batisantefr for more information |
516 |
| 64 |
BRL Groupebrl.fr
The company is a leading group in France specializing in water and environmental solutions through hydraulic engineering, infrastructure development, and operation services |
511 |
| 65 |
GROUPE CORIANCEgroupe-coriance.fr
Providing high-performance and cost-effective energy solutions while minimizing environmental impact, specializing in renewable energy sources like geothermal, biomass, and cogeneration |
509 |
| 66 |
DeCA Propretédeca-proprete.fr
Provides tailored cleaning and maintenance services to professional clients, ensuring high-quality results with advanced techniques and equipment. |
501 |
| 67 |
Urbaser Environnement SASurbaserenvironnement.fr
A leading player in environmental services for local authorities specializing in waste collection, cleaning, and waste valorization through innovative technologies globally |
501 |
| 68 |
SULO Francesulo.fr
Partner for local authorities and businesses providing waste management solutions, recycling services, and sustainable environmental practices. |
486 |
| 69 |
Inddigoinddigo.com
Specializing in sustainable development engineering to create environmentally-friendly solutions and promote a more sustainable future |
464 |
| 70 |
VERDIweb.verdi.fr
Group of engineers, architects, and environmental specialists focusing on sustainable territory planning, integrating environmental crisis and technological advances. |
439 |
| 71 |
Veolia | Engineering & Consultingengineering-consulting.veolia.com
Consulting engineering and strategic assistance division specializing in designing sustainable solutions for public, industrial, and tertiary sectors, focusing on resource management and performance improvement |
436 |
| 72 |
Veolia | Énergie & Décarbonationveolia.fr
Provides energy audits, renewable production, smart cooling networks, and performance optimization to ensure sovereignty and environmental footprint reduction for industries and local territories. |
429 |
| 73 |
Groupe Chimirecchimirec.fr
Specializing in managing both hazardous and non-hazardous waste, including collection, consolidation, and sustainable disposal methods |
426 |
| 74 |
Veolia Industries Global Solutionsindustries.veolia.com
Specializes in energy efficiency and performance solutions, focusing on optimizing industrial energy use and sustainability practices. |
417 |
| 75 |
Société des Eaux de Marseille💧eauxdemarseille.fr
Manages water and sanitation services for 1.5 million people in Provence, including production, distribution, wastewater collection, treatment, and environmental preservation. |
396 |
| 76 |
pinson paysagepinson-paysage.com
Specializes in designing, creating, and maintaining landscape projects across multiple regions in France with extensive experience. |
379 |
| 77 |
Groupe OCEAgroupe-ocea.fr
Specializes in energy efficiency, water management, smart metering, and electric vehicle charging solutions for collective housing and property managers. |
378 |
| 78 |
GreenFlexgreenflex.com
The company aims to guide businesses in implementing environmental and societal solutions, promoting regenerative economy with a mix of expertise |
369 |
| 79 |
Defense Environnement Servicesindustries.veolia.com
Specializes in industrial maintenance, facility management, and logistics for complex defense environments including production sites, offices, and military bases. |
354 |
| 80 | 350 | |
| 81 |
SENI: Société d'Entretien et de Nettoyage Industrielseni.fr
Established in 1966, SENI is a nationally recognized cleaning company known for its expertise, values, and commitment to providing clean and welcoming environments for clients |
346 |
| 82 |
MANERGYmanergy.fr
Specialized engineering and consulting firm providing innovative, sustainable solutions for energy efficiency, decarbonization, and renewable energy transitions across multiple sectors. |
343 |
| 83 |
Dalkia Electrotechnicsdalkiaelectrotechnics.fr
Design, construction, operation, and maintenance of high, medium, and low voltage electrical installations for industry, healthcare, education, data centers, logistics, and smart city infrastructure. |
343 |
| 84 |
CLIMAWATTclimawatt.com
It specializes in photovoltaic energy and energy savings, offering expert guidance and support for solar energy projects and installations. |
341 |
| 85 |
BRL Ingénieriebrli.brl.fr
High-level engineers providing innovative water, environmental, and territorial development solutions addressing climate, food security, and ecological transitions globally. |
340 |
| 86 |
Groupe Baudeletgroupe-baudelet.fr
It is a family-owned company focused on sustainable development, operating in Environment, Energy, Commerce, and Well-being sectors with 680 employees. |
334 |
| 87 |
Agence de l'eau Seine-Normandieeau-seine-normandie.fr
Support sustainable water resource management and aquatic environment preservation through funding local projects and developing water policy strategies. |
333 |
| 88 |
Helliohellio.com
Pioneer energy savings market France; master energy; expertise, innovation, solutions, energy consumers, all buildings and equipment. Focused energy transition. |
319 |
| 89 |
EODD ingénieurs conseilseodd.fr
Provides expert ecological transition consulting and engineering services for sustainable projects, offering solutions for urban planning, energy, biodiversity, and waste management. |
319 |
| 90 | 316 | |
| 91 |
Syndicat des Eaux et de l’Assainissement Alsace-Mosellesdea.fr
The company specializes in water supply and sanitation, serving over 740,000 residents in 450+ municipalities in Bas-Rhin with a focus on local identity and sustainable performance |
314 |
| 92 |
Labocéalabocea.fr
A multidisciplinary team in Brittany providing analysis services in health, environment, and agri-food sectors, offering sampling, laboratory testing, advice, and expertise with transparency and reliability |
313 |
| 93 |
Samexsamex92.fr
Samex, a subsidiary of Dalkia group, specializes in operating Multi-Technical and HVAC systems, as well as designing and implementing heating, ventilation, air conditioning, and plumbing projects |
309 |
| 94 | 306 | |
| 95 |
ENERGY POOLenergy-pool.eu
Energy Pool optimizes energy consumption, decentralized production, and storage to achieve smarter, low-carbon energy management, leading developments in multiple countries |
305 |
| 96 |
VALGO Groupe - Sites et sols polluésvalgo.com
Specializes in rehabilitating polluted sites by providing innovative solutions for soil, building, and infrastructure decontamination and revitalization. |
290 |
| 97 |
Brézillonbrezillon.fr
Specializes in environmental engineering, preserving, restoring, and enhancing land across the nation. Addresses environmental challenges through site remediation, brownfield rehabilitation, and carbon footprint reduction. |
288 |
| 98 |
Agence de l'eau Rhône Méditerranée Corseeaurmc.fr
Collects fees from water users based on consumption and pollution, then reinvests funds to improve water quality and aquatic environments through various improvement projects. |
287 |
| 99 |
Noréade, les Régies du SIDEN-SIANagenceenligne.noreade.fr
Management and operation of water supply, sanitation, stormwater, and fire defense services for over 730 municipalities in northern France. |
280 |
| 100 |
DI Environnementdi-environnement.fr
An environmental services company specializing in asbestos removal, lead abatement, pickling, and decontamination, serving construction, industry, and risk environments worldwide |
274 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 9, 2026.
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