# The 28 largest Engineering Services companies in Provence-Alpes-Côte d'Azur

Tamtam tracks 28 Engineering Services companies headquartered in Provence-Alpes-Côte d'Azur. This list ranks all of them by number of employees on LinkedIn, led by Groupe ACCEO | BET Energie, Ascenseur, Environnement, AMO & MOE Spécialisées, Sonovision - Ortec Group and TPF INGENIERIE. Their median headcount is 28. Half of them were founded in 2009 or later. The most common headquarters are Marseille (6), Aix-en-Provence (3) and La Ciotat (2).

The engineering services companies in Provence-Alpes-Côte d'Azur featured here are a mix of mid-sized and smaller firms. They provide a range of specialized consulting and technical solutions. For instance, Groupe ACCEO offers specialized engineering for buildings, while Sonovision - Ortec Group focuses on complex systems content. TPF INGENIERIE specializes in Building, Infrastructure, Water/Environment, and Energy, and SOPHIA Engineering provides multi-sector scientific and technical consulting.

Most of these companies were founded in the 21st century, indicating a relatively recent growth in the sector. A notable concentration of headquarters is observed in Marseille and Aix-en-Provence, suggesting these cities are key hubs for engineering services in the region. The companies cater to diverse industries including aerospace, nuclear, automotive, and marine.

🇫🇷 Provence-Alpes-Côte d'Azur · 28 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Groupe ACCEO \| BET Energie, Ascenseur, Environnement, AMO & MOE Spécialisées](https://www.tamtam.ai/c/groupe-acceo-bet-energie-ascenseur-environnement-amo-and-moe-specialisees) (acceo.eu)<br>Providing specialized engineering consulting for buildings, focusing on elevators, energy efficiency, environment, and project management to optimize operations and reduce costs. | Engineering Services | 🇫🇷 La Ciotat | 569 | 2003 |
| 2 | [Sonovision - Ortec Group](https://www.tamtam.ai/c/sonovision-ortec-group) (sonovisiongroup.com)<br>Experts process complex systems content, enriching products with innovative solutions throughout their lifecycle, from design to technical content and training for optimized field operations. | Engineering Services | 🇫🇷 Aix-en-Provence | 568 |  |
| 3 | [TPF INGENIERIE](https://www.tamtam.ai/c/tpf-ingenierie) (tpf-i.fr)<br>An engineering company specializing in Building, Infrastructure, Water/Environment, Energy/Maintenance sectors with a collaborative and innovative approach to project development | Engineering Services | 🇫🇷 Marseille | 470 | 1957 |
| 4 | [SOPHIA Engineering](https://www.tamtam.ai/c/sophia-engineering) (sophiaengineering.com)<br>Provides multi-sector, multi-discipline scientific and technical engineering consulting services, studies, and R&D for product lifecycle support, locally and internationally. | Engineering Services | 🇫🇷 Sophia Antipolis | 194 | 2005 |
| 5 | [IMPAC Ingénierie (MPA Group)](https://www.tamtam.ai/c/impac-ingenierie-mpa-group) (impac-ingenierie.com)<br>Engineering consulting firm supporting major industrial sectors with project lifecycle guidance, local presence, and expert teams across France. | Engineering Services | 🇫🇷 Grans | 183 | 1988 |
| 6 | [ARIAL Industries](https://www.tamtam.ai/c/arial-industries) (arial-industries.com)<br>ARIAL Industries is an engineering company specializing in mechanical, electrical/electronic, and embedded systems for clients in aerospace, nuclear, automotive, and space industries | Engineering Services | 🇫🇷 Aix-en-Provence | 141 | 2001 |
| 7 | [PRINCIPIA](https://www.tamtam.ai/c/principia) (principia-group.com)<br>PRINCIPIA provides top-class engineering services, specializing in sustainable development and offering innovative, cost-effective solutions for large EPCI projects since 1981 | Engineering Services | 🇫🇷 La Ciotat | 114 | 1981 |
| 8 | [IBITEK-Group](https://www.tamtam.ai/c/ibitek-group) (ibitek-group.com)<br>Industrial company providing electrical and automation solutions with over 15 years experience. Specialized in intelligent industry tools for production control, electrical plan management, truck flow, and remote maintenance. | Engineering Services | 🇫🇷 Marseille | 106 | 2007 |
| 9 | [l'office](https://www.tamtam.ai/c/l-office) (loffice.coop)<br>The company specializes in research, engineering, and support in cultural cooperation, digital transformation, and cultural rights within the cultural sector | Engineering Services | 🇫🇷 Marseille | 43 | 2012 |
| 10 | [SIMEC Technologies (Orange Marine's subsea robotics department since 2000)](https://www.tamtam.ai/c/simec-technologies-orange-marine-s-subsea-robotics-department-since-2000) (orange.com)<br>Specializing in subsea vehicles design and manufacture, offering cable burial, surveys, and removal services tailored to customers with expertise since 1979 | Engineering Services | 🇫🇷 Fuveau | 41 | 1979 |
| 11 | [DIOXYTECH ENGINEERING](https://www.tamtam.ai/c/dioxytech-engineering) (dioxytech.com)<br>Offering solutions to industrial challenges by supporting project owners, engineering firms, and equipment manufacturers with comprehensive assistance | Engineering Services | 🇫🇷 Aix-en-Provence | 38 | 2013 |
| 12 | [Eleven](https://www.tamtam.ai/c/eleven) (elevengroup.fr)<br>Assembles, retains, and rewards engineers and technicians fairly, providing innovative engineering, technology, and consulting solutions. Focused on employee well-being and project success. | Engineering Services | 🇫🇷 Istres | 35 | 2023 |
| 13 | [NAO](https://www.tamtam.ai/c/nao-marseille) (naosas.fr)<br>Engineering company specializing in industrial projects, providing innovative solutions and expertise in various areas of the industry | Engineering Services | 🇫🇷 Marseille | 31 | 2023 |
| 14 | [Citinnov](https://www.tamtam.ai/c/citinnov) (citinnov.com)<br>A company with 25 years of experience designing, manufacturing, and distributing perimeter protection solutions including secure entrance control and innovative solar energy integration | Engineering Services | 🇫🇷 Châteaurenard | 28 | 2011 |
| 15 | [d2m Engineering](https://www.tamtam.ai/c/d2m-engineering) (d2m-group.com)<br>A team of marine engineers and naval architects providing innovative solutions for complex maritime projects, specializing in vessel design and construction | Engineering Services | 🇫🇷 Six-Fours-les-Plages | 27 | 1986 |
| 16 | [ORION tech](https://www.tamtam.ai/c/orion-tech) (orion-tech.fr)<br>ORION tech is a high-tech engineering company that provides expertise in naval, defense, aerospace, energy, nuclear, and heavy industry sectors They prioritize quality service and innovation | Engineering Services | 🇫🇷 Gardanne | 25 | 2013 |
| 17 | [AJR Conseil](https://www.tamtam.ai/c/ajr-conseil) (ajrconseil.com)<br>Industrial project management and engineering services specializing in energy transition, decarbonization, and construction supervision across nuclear, chemical, and life science process sectors. | Engineering Services | 🇫🇷 Avignon | 24 | 2009 |
| 18 | [HELISA](https://www.tamtam.ai/c/helisa) (helisa.io)<br>Engineering and services company specializing in industry and small hydropower projects | Engineering Services | 🇫🇷 Tarascon | 22 | 2023 |
| 19 | [SECMO](https://www.tamtam.ai/c/secmo) (tpf-i.fr)<br>SECMO is a technical engineering firm specializing in structural execution studies, with expertise in complex concrete building structures across various sectors | Engineering Services | 🇫🇷 Marseille | 13 | 1984 |
| 20 | [ARD INGENIERIE](https://www.tamtam.ai/c/ard-ingenierie) (alienor-groupe.com)<br>A specialized engineering firm in The Tholonet, offering services in engineering, project management, and coordination for public and private clients | Engineering Services | 🇫🇷 Le Tholonet | 12 |  |
| 21 | [EMYG](https://www.tamtam.ai/c/emyg) (emygaqua.com)<br>EMYG specializes in water treatment, providing secure solutions for 28 years with patented technology, serving clients worldwide in aquaculture, wastewater treatment, and environmental sectors | Engineering Services | 🇫🇷 Carnoux-en-Provence | 9 | 1996 |
| 22 | [G-MET TECHNOLOGIES](https://www.tamtam.ai/c/g-met-technologies) (g-met.fr)<br>Specialized consulting firm in numerical simulations, providing expertise in simulation codes, physics knowledge, and top-quality simulations for engineering optimization and design | Engineering Services | 🇫🇷 Six-Fours-les-Plages | 9 | 2014 |
| 23 | [PRO ELEC DIFFUSION](https://www.tamtam.ai/c/pro-elec-diffusion) (proelecdiffusion.com)<br>Specializing in electrical engineering, this dynamic company in the Bouches du Rhône offers study, design, and realization services for industrial and water sectors | Engineering Services | 🇫🇷 Vitrolles | 9 |  |
| 24 | [ORION](https://www.tamtam.ai/c/orion-marseille)<br>A maritime engineering company providing a range of services for shipbuilding, conversions, equipment installation, and expert assistance in marine and offshore industries globally | Engineering Services | 🇫🇷 Marseille | 8 |  |
| 25 | [Nautilus Dynamics](https://www.tamtam.ai/c/nautilus-dynamics) (nautilusdynamics.com)<br>Providing innovative and cost-effective offshore engineering solutions for wind, oil, gas, ports, and coastal developments worldwide Specializing in project management and hydrodynamics | Engineering Services | 🇫🇷 Nice | 6 | 2017 |
| 26 | [Groupe B.E.C.](https://www.tamtam.ai/c/groupe-b-e-c) (groupe-bec.fr)<br>Provides mechanical and electrical engineering support for large-scale projects in the aerospace, space, and automotive sectors for over twenty years. | Engineering Services | 🇫🇷 Vitrolles | 5 | 1998 |
| 27 | [NUAGE3D](https://www.tamtam.ai/c/nuage3d) (nuage3d.com)<br>A digital services company specializing in 3D scanning, offering topography, CAD, and 3D design services to public and private clients in the region | Engineering Services | 🇫🇷 La Colle-sur-Loup | 3 | 2015 |
| 28 | [Arion System](https://www.tamtam.ai/c/arion-system) (arionsystem.fr)<br>Innovative engineering team providing expertise in industrial sectors like naval, robotics, aerospace, and defense, backed by top recruitment specialists | Engineering Services | 🇫🇷 Toulon | 2 | 2023 |

## 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.

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Source: https://www.tamtam.ai/l/engineering-services-companies-provence-alpes-cote-dazur