# Top 50 Engineering Services companies in Île-de-France

Tamtam tracks 98 Engineering Services companies headquartered in Île-de-France. This list ranks the 50 largest by number of employees on LinkedIn, led by Capgemini Engineering, ALTEN and Technip Energies. Their median headcount is 299. Half of them were founded in 2000 or later. The most common headquarters are Paris (21), Montrouge (3) and Les Ulis (2).

The engineering services companies in Île-de-France are a mix of large groups and mid-sized firms, with some younger companies also present. They specialize in a wide range of engineering disciplines, from digital and software technologies to infrastructure and energy. Companies like Capgemini Engineering provide R&D services for intelligent industry, while ALTEN supports businesses in technological and sustainable transformation. Technip Energies focuses on energy engineering, including LNG and hydrogen, and SEGULA Technologies offers global engineering services across industrial sectors.

The data shows a strong concentration of headquarters in Paris and its surrounding suburbs, indicating the region's central role in the engineering sector. SYSTRA specializes in public transport and mobility solutions, and Edvance designs nuclear islands and control commands. The activities span traditional industrial engineering, digital transformation, and sustainable energy solutions, reflecting the diverse needs of modern industries.

🇫🇷 Île-de-France · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Capgemini Engineering](https://www.tamtam.ai/c/capgemini-engineering) (capgemini.com)<br>Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry. | Engineering Services | 🇫🇷 Paris | 44,836 |  |
| 2 | [ALTEN](https://www.tamtam.ai/c/alten) (alten.com)<br>Provides engineering and IT services, supporting businesses in technological and sustainable transformation across various industries with high-level consultant-engineers. | Engineering Services | 🇫🇷 Boulogne-Billancourt | 38,710 | 1988 |
| 3 | [Technip Energies](https://www.tamtam.ai/c/technip-energies) (ten.com)<br>Leading energy engineering & technology company focused on LNG, hydrogen, ethylene, sustainable chemistry, and CO2 management Committed to accelerating the energy transition globally | Engineering Services | 🇫🇷 Paris | 18,645 |  |
| 4 | [SEGULA Technologies](https://www.tamtam.ai/c/segula-technologies) (segulatechnologies.com)<br>Provides global engineering services across major industrial sectors, committed to innovation, from research to industrialization and production. | Engineering Services | 🇫🇷 Nanterre | 11,442 |  |
| 5 | [SYSTRA](https://www.tamtam.ai/c/systra) (systra.com)<br>Leading engineering and consultancy group specializing in public transport and mobility solutions, connecting people and regions through transport infrastructure development. | Engineering Services | 🇫🇷 Paris | 10,162 |  |
| 6 | [Ingérop](https://www.tamtam.ai/c/ingerop) (ingerop.fr)<br>An independent engineering company with expertise in infrastructure, transportation, water, environment, energy, and industrial facilities in over 70 countries | Engineering Services | 🇫🇷 Rueil-Malmaison | 2,268 | 1992 |
| 7 | [Abylsen](https://www.tamtam.ai/c/abylsen) (abylsen.com)<br>A company that values collective intelligence and encourages exploring new possibilities to create infinite value in various directions | Engineering Services | 🇫🇷 Paris | 2,163 | 2005 |
| 8 | [Edvance](https://www.tamtam.ai/c/edvance) (edvance.fr)<br>Designs and implements nuclear islands and control commands for nuclear reactors under construction, domestically and internationally. | Engineering Services | 🇫🇷 Montrouge | 1,943 | 2017 |
| 9 | [LGM](https://www.tamtam.ai/c/lgm-velizy-villacoublay) (lgm.group)<br>The company offers technological, digital, and software engineering consulting, innovative solution design, and complex electronics production, supporting critical systems and industrial performance. | Engineering Services | 🇫🇷 Velizy-Villacoublay | 1,469 | 1991 |
| 10 | [ADVANS Group](https://www.tamtam.ai/c/advans-group) (advans-group.com)<br>Engineering firm specializing in electronic, software, and mechanical systems; handles projects or provides expertise in microelectronics, software development, data/AI, and mechanical engineering. | Engineering Services | 🇫🇷 Cachan | 1,040 | 2000 |
| 11 | [GTT](https://www.tamtam.ai/c/gtt) (gtt.fr)<br>Designs, builds cryogenic containment systems for liquefied gas transport, storage, develops LNG fuel systems, smart shipping, and green hydrogen electrolysers. | Engineering Services | 🇫🇷 Saint-Rémy-lès-Chevreuse | 729 |  |
| 12 | [SYSTRA France](https://www.tamtam.ai/c/systra-france) (systra.com)<br>Engineering and consulting for public transport and mobility solutions, improving and modernizing transport infrastructure across urban and regional territories. | Engineering Services | 🇫🇷 Paris | 633 | 1957 |
| 13 | [OTEIS Conseil & Ingénierie](https://www.tamtam.ai/c/oteis-conseil-and-ingenierie) (oteis.fr)<br>French independent group, provides consulting, engineering, and solutions for public and private projects across building, water, infrastructure, and industrial sectors, emphasizing green and digital engineering. | Engineering Services | 🇫🇷 Bois-Colombes | 619 | 2015 |
| 14 | [VERTICAL SEA](https://www.tamtam.ai/c/vertical-sea) (vertical-sea.com)<br>A group providing engineering, consulting, and project management services in various sectors including real estate, construction, energy, and urban planning | Engineering Services | 🇫🇷 Sèvres | 553 | 2021 |
| 15 | [ASTRON](https://www.tamtam.ai/c/astron) (astrongroup.fr)<br>Provide engineering consulting, training, and project support to drive innovation and transition in energy production and consumption sectors. | Engineering Services | 🇫🇷 Paris | 500 | 2024 |
| 16 | [Elsys Design](https://www.tamtam.ai/c/elsys-design) (elsys-design.com)<br>Designs embedded electronic systems, specializing in microelectronics, hardware, embedded software, and systems for diverse sectors like energy, space, and automotive. | Engineering Services | 🇫🇷 Paris - Cachan | 471 | 2000 |
| 17 | [DORIS Group](https://www.tamtam.ai/c/doris-group) (dorisgroup.com)<br>Leading engineering, advisory, and project management services for clean conventional, renewable, and new energy projects globally. | Engineering Services | 🇫🇷 Paris | 437 | 1965 |
| 18 | [MASER ENGINEERING](https://www.tamtam.ai/c/maser-engineering) (maser-engineering.com)<br>Established in 1973, this company provides industrial process design, integration, and maintenance services for leading industry groups across multiple sectors, with strong growth and diverse projects | Engineering Services | 🇫🇷 Paris | 426 | 1973 |
| 19 | [SEMERU - FAYAT ENERGIE SERVICES](https://www.tamtam.ai/c/semeru-fayat-energie-services) (fayat.com)<br>SEMERU, part of FAYAT ENERGIE SERVICES, specializes in developing and deploying high-tech tools for building, infrastructure, facility management, environment, and transportation sectors | Engineering Services | 🇫🇷 Rungis | 424 | 1994 |
| 20 | [WSP en France](https://www.tamtam.ai/c/wsp-en-france) (wsp.com)<br>A global professional engineering firm offering sustainable solutions in building, transportation, environment, industry, energy sectors with expertise in project delivery and strategic advice | Engineering Services | 🇫🇷 Paris | 393 | 1959 |
| 21 | [Anotech](https://www.tamtam.ai/c/anotech) (anotech.com)<br>Partnering on large infrastructure projects, ensuring smooth execution, mitigating risks, and delivering compliant, high-quality, and safe solutions across all project phases. | Engineering Services | 🇫🇷 Paris | 387 | 2006 |
| 22 | [ELCIMAÏ](https://www.tamtam.ai/c/elcimai) (elcimai.com)<br>A French holding specializing in building and process engineering, logistics consulting, and IT engineering, with subsidiaries catering to various industries | Engineering Services | 🇫🇷 Melun | 378 | 1992 |
| 23 | [Desmet Ballestra](https://www.tamtam.ai/c/desmet-ballestra) (desmet.com)<br>Provides custom-engineered plants and equipment for food, feed, and biofuels industries, transforming oilseeds, grains, and tropical oils into various products. | Engineering Services | 🇫🇷 Paris | 349 |  |
| 24 | [FEV France](https://www.tamtam.ai/c/fev-france) (fev.com)<br>Offers engineering and consulting services for powertrain, vehicle, and energy infrastructure development. Supports transport and energy sectors with innovation and R&D expertise. | Engineering Services | 🇫🇷 Trappes | 348 | 2004 |
| 25 | [BERIM](https://www.tamtam.ai/c/berim) (berim.fr)<br>A leading French engineering and consulting group focusing on sustainable development, urban techniques, and environmental preservation with 320 employees | Engineering Services | 🇫🇷 Paris | 299 | 1948 |
| 26 | [Sofren Group](https://www.tamtam.ai/c/sofren-group) (vulcain-eng.com)<br>An international consulting company specializing in engineering, management, and industrial strategy for the Energy, Industry, and Infrastructure sectors | Engineering Services | 🇫🇷 Saint-Cloud | 297 | 2006 |
| 27 | [APL Data Center](https://www.tamtam.ai/c/apl-data-center) (apl-datacenter.com)<br>Consultancy, engineering, construction, operation, and maintenance of data centers. Sustainable IT and ecological data center design. | Engineering Services | 🇫🇷 Montrouge | 280 | 1983 |
| 28 | [NBTECH](https://www.tamtam.ai/c/nbtech) (nbtech.fr)<br>Technical studies, technology consulting, and industrial engineering services for automotive, aerospace, railway, and industrial maintenance sectors across France. | Engineering Services | 🇫🇷 Les Ulis | 244 | 2014 |
| 29 | [Kickmaker](https://www.tamtam.ai/c/kickmaker) (kickmaker.fr)<br>A multidisciplinary team passionate about high-tech product development, specializing in robotics, medical, consumer electronics, and sustainability, with an emphasis on CSR | Engineering Services | 🇫🇷 Paris | 242 | 2016 |
| 30 | [setec its](https://www.tamtam.ai/c/setec-its) (setec.fr)<br>Specializes in urban mobility and transport engineering, designing intelligent services, systems, and infrastructure. It advises clients on strategic technical challenges, innovating in digitalization and decarbonization. | Engineering Services | 🇫🇷 Paris | 242 | 2000 |
| 31 | [AVENTA](https://www.tamtam.ai/c/aventa) (aventa.fr)<br>Empowers Marine Energy market; provides Engineering & Consultancy services; focuses on technical excellence, employees, and innovative solutions for customers. | Engineering Services | 🇫🇷 Paris | 232 | 2009 |
| 32 | [CITEMETRIE](https://www.tamtam.ai/c/citemetrie) (citemetrie.fr)<br>Specializes in housing renovation, providing audits, diagnostics, strategic consulting, and support for individuals, co-owners, communities, and social landlords. | Engineering Services | 🇫🇷 Paris | 227 | 1989 |
| 33 | [Comutitres](https://www.tamtam.ai/c/comutitres) (comutitres.fr)<br>Operational management of Navigo transport tickets, customer support, revenue distribution, and development of innovative mobility solutions in Île-de-France. | Engineering Services | 🇫🇷 Paris | 210 | 2000 |
| 34 | [ADVANCE Engineering](https://www.tamtam.ai/c/advance-engineering) (advance-eng.fr)<br>ADVANCE Engineering, a subsidiary of CERAP Prévention, specializes in providing technical engineering services for complex projects in the nuclear sector | Engineering Services | 🇫🇷 Les Ulis | 205 | 2012 |
| 35 | [Groupe Solstyce](https://www.tamtam.ai/c/groupe-solstyce) (groupe-solstyce.fr)<br>Engineering, construction, and maintenance of solar photovoltaic power plants supporting energy transition for territories and businesses across the nation. | Engineering Services | 🇫🇷 Paris | 204 | 2009 |
| 36 | [SHERPA ENGINEERING](https://www.tamtam.ai/c/sherpa-engineering) (sherpa-eng.com)<br>Expertise in system engineering with modeling, simulation, and control-command services supported by proprietary tools and ongoing R&D partnerships. | Engineering Services | 🇫🇷 Nanterre | 195 | 1997 |
| 37 | [3D PRINT](https://www.tamtam.ai/c/3d-print) (3dprint.fr)<br>Design office specializing in technology consulting, mechanical prototypes, and small series manufacturing across various sectors like automotive, medical, and aeronautic | Engineering Services | 🇫🇷 Marolles-en-Brie | 171 | 2004 |
| 38 | [INEXCO GROUPE](https://www.tamtam.ai/c/inexco-groupe) (inexco-groupe.com)<br>Provides multidisciplinary expertise and intervention capabilities for industrial facility surveillance, including technical inspection, thermal treatment, tank inspection, rope access work, and non-destructive testing. | Engineering Services | 🇫🇷 Port-Jérôme-sur-Seine | 165 | 1981 |
| 39 | [Transamo](https://www.tamtam.ai/c/transamo) (transamo.fr)<br>Company specialized in mobility project management: quantitative studies, transportation planning, urban studies, project management, risk management, technical expertise, innovation in mobility solutions | Engineering Services | 🇫🇷 Issy-les-Moulineaux | 137 | 1994 |
| 40 | [LGM Ingénierie](https://www.tamtam.ai/c/lgm-ingenierie) (lgm.group)<br>Experts in embedded electronics, test equipment, and embedded networks for major industrial players in aeronautics, defense, rail, and automotive sectors. | Engineering Services | 🇫🇷 Velizy-Villacoublay | 135 | 2007 |
| 41 | [iRiS Conseil](https://www.tamtam.ai/c/iris-conseil) (irisconseil.com)<br>Independent engineering firm with 140 experts specializing in transport infrastructure, urban planning, environment, mobility, and landscape project management. | Engineering Services | 🇫🇷 Montigny-le-Bretonneux | 118 | 1993 |
| 42 | [Advantage](https://www.tamtam.ai/c/advantage-puteaux) (ad-vantage.fr)<br>Provides engineering expertise for strategic projects in energy, mobility, and telecommunications, from design to equipment and infrastructure commissioning on site. | Engineering Services | 🇫🇷 Puteaux | 103 | 2006 |
| 43 | [Olys Engineering](https://www.tamtam.ai/c/olys-engineering) (olys-engineering.com)<br>Provides agile engineering solutions for energy and related industries, covering creation, startup, operation, maintenance, and modification of industrial equipment and installations. | Engineering Services | 🇫🇷 Courbevoie | 98 | 2020 |
| 44 | [Arpon Technologies](https://www.tamtam.ai/c/arpon-technologies) (arpon-technologies.com)<br>ARPON TECHNOLOGIES is a consulting firm specializing in engineering and project management in various sectors They provide services from concept to completion, with a focus on quality and client satisfaction | Engineering Services | 🇫🇷 Montrouge | 97 | 2015 |
| 45 | [HOUSE OF ABY](https://www.tamtam.ai/c/house-of-aby)<br>Engineering and consulting firm specializing in innovative solutions across energy, aerospace, digital transformation, and life sciences sectors with regional agility. | Engineering Services | 🇫🇷 Paris | 89 | 2005 |
| 46 | [SYMBIOZ](https://www.tamtam.ai/c/symbioz-paris) (selene.tech)<br>Consulting firm specializing in Mechanical, Electronic, and IT fields, placing engineers in development projects with major industry clients. | Engineering Services | 🇫🇷 Paris | 82 |  |
| 47 | [A.G.I.R](https://www.tamtam.ai/c/a-g-i-r) (agir-ingenierie.fr)<br>Support naval, offshore, aerospace industries with technical and financial project mastery, innovative solutions, project management, audit, training, and coaching services. | Engineering Services | 🇫🇷 Suresnes | 73 | 1987 |
| 48 | [TVA Engineering](https://www.tamtam.ai/c/tva-engineering) (groupe-tva.com)<br>A well-established engineering company providing expertise in various sectors like oil & gas, power generation, water treatment, and more with a focus on client success | Engineering Services | 🇫🇷 Antony | 73 | 1988 |
| 49 | [Groupe Genaris](https://www.tamtam.ai/c/groupe-genaris) (genaris.fr)<br>Specializes in electrical and electronic design, prototyping, and manufacturing with integrated product development for defense, mobility, and industry sectors. | Engineering Services | 🇫🇷 Guyancourt | 71 |  |
| 50 | [SATIF SCUTUM GROUP](https://www.tamtam.ai/c/satif-scutum-group) (satif.fr)<br>A leader in innovative solutions for safety and security, offering high-tech engineering services for industries such as aerospace, defense, marine, and automotive since 1977 | Engineering Services | 🇫🇷 Paris | 71 | 1977 |

## 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 Nov 12, 2026.

## More company lists in Île-de-France

- [The largest companies in Île-de-France](https://www.tamtam.ai/l/largest-companies-ile-de-france) (36,142)
- [Multinational companies in Île-de-France](https://www.tamtam.ai/l/multinational-companies-ile-de-france) (6,028)
- [Professional services firms in Île-de-France](https://www.tamtam.ai/l/professional-services-firms-ile-de-france) (3,377)
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- [IT Services and IT Consulting companies in Île-de-France](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ile-de-france) (2,776)
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- [IT services companies in Île-de-France](https://www.tamtam.ai/l/it-services-companies-ile-de-france) (2,624)
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- [Retail chains in Île-de-France](https://www.tamtam.ai/l/retail-chains-ile-de-france) (2,316)
- [Software Development companies in Île-de-France](https://www.tamtam.ai/l/software-development-companies-ile-de-france) (1,992)
- [Business Consulting and Services companies in Île-de-France](https://www.tamtam.ai/l/business-consulting-and-services-companies-ile-de-france) (1,904)
- [Financial services firms in Île-de-France](https://www.tamtam.ai/l/financial-services-firms-ile-de-france) (1,731)
- [Manufacturers in Île-de-France](https://www.tamtam.ai/l/manufacturers-ile-de-france) (1,515)
- [Law Practice companies in Île-de-France](https://www.tamtam.ai/l/law-practice-companies-ile-de-france) (1,366)
- [Subscription businesses in Île-de-France](https://www.tamtam.ai/l/subscription-businesses-ile-de-france) (1,359)
- [Education providers in Île-de-France](https://www.tamtam.ai/l/education-companies-ile-de-france) (1,300)
- [Advertising Services companies in Île-de-France](https://www.tamtam.ai/l/advertising-services-companies-ile-de-france) (1,264)
- [Financial Services companies in Île-de-France](https://www.tamtam.ai/l/financial-services-companies-ile-de-france) (1,197)
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- [Hardware manufacturers in Île-de-France](https://www.tamtam.ai/l/hardware-companies-ile-de-france) (1,142)
- [Companies with a mobile app in Île-de-France](https://www.tamtam.ai/l/companies-with-mobile-app-ile-de-france) (1,105)
- [Recruitment and staffing agencies in Île-de-France](https://www.tamtam.ai/l/recruitment-agencies-ile-de-france) (1,014)
- [Public sector organisations in Île-de-France](https://www.tamtam.ai/l/public-sector-organisations-ile-de-france) (993)
- [Technology, Information and Internet companies in Île-de-France](https://www.tamtam.ai/l/technology-information-and-internet-companies-ile-de-france) (982)

## The same list elsewhere in France

- [Engineering Services companies in France](https://www.tamtam.ai/l/engineering-services-companies-france) (301)
- [Engineering Services companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/engineering-services-companies-auvergne-rhone-alpes) (50)
- [Engineering Services companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/engineering-services-companies-provence-alpes-cote-dazur) (28)
- [Engineering Services companies in the Rhône department](https://www.tamtam.ai/l/engineering-services-companies-rhone) (25)
- [Engineering Services companies in Paris](https://www.tamtam.ai/l/engineering-services-companies-paris) (33)

## The same list elsewhere

- [Engineering Services companies in the world](https://www.tamtam.ai/l/engineering-services-companies-in-the-world) (1,150)
- [Engineering Services companies in Europe](https://www.tamtam.ai/l/engineering-services-companies-in-europe) (623)

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Source: https://www.tamtam.ai/l/engineering-services-companies-ile-de-france