# Professional services firms headquartered in Aix-en-Provence

Tamtam tracks 59 professional services firms headquartered in Aix-en-Provence. This list ranks the 30 largest by number of employees on LinkedIn, led by Ortec Group, Sonovision - Ortec Group and Key Performance Consulting (KPC). Their median headcount is 71. Half of them were founded in 2008 or later.

These professional services firms in Aix-en-Provence are predominantly mid-sized to large companies, with a strong focus on IT services, engineering, and environmental solutions. Ortec Group, with 4388 employees, provides multidisciplinary services for industry, energy, and environment. Key Performance Consulting (KPC) offers technology consulting and services for large project integration, while ECP - Project Management .INtelligence specializes in project management consulting for sectors like Oil & Gas and Nuclear. PMSm is a leader in medical assistance for industrial environments.

The data shows a significant concentration of companies founded in the early 2000s, such as REACTIS Group (2001), ARIAL Industries (2001), and Systerel (2001), indicating a period of growth and establishment for professional services in the region. Many of these firms also serve specialized and critical sectors like defense, aerospace, and energy.

🇫🇷 Aix-en-Provence · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Ortec Group](https://www.tamtam.ai/c/ortec-group) (ortec-group.com)<br>Provides multidisciplinary services for industry, energy, and environment, including maintenance, new works, environmental services, facilities management, logistics, and engineering consulting. | Environmental Services | 🇫🇷 Aix-en-Provence | 4,388 |  |
| 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 | [Key Performance Consulting (KPC)](https://www.tamtam.ai/c/key-performance-consulting-kpc) (keyperformance-consulting.com)<br>Global player in upstream and integration phases for systems, offering technology consulting and services for large project integration and business process improvement. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 474 | 2010 |
| 4 | [ECP - Project Management .INtelligence](https://www.tamtam.ai/c/ecp-project-management-intelligence) (assystem.com)<br>Project Management Consulting Group specializing in Oil & Gas, Nuclear, Energy, Defense, Infrastructures, Chemistry, Metallurgy sectors Services include project management, cost estimation, risk management, and more | Business Consulting and Services | 🇫🇷 Aix-en-Provence | 287 |  |
| 5 | [PMSm](https://www.tamtam.ai/c/pmsm) (pmsm.fr)<br>French leader in medical assistance for industrial and tertiary environments, offering outsourced medical staff, emergency medical services, prevention programs, and biomedical engineering solutions | Medical Practices | 🇫🇷 Aix-en-Provence | 282 | 1994 |
| 6 | [OCEANCALL](https://www.tamtam.ai/c/oceancall) (oceancall.co)<br>OceanCall is an independent and innovative outsourcing company offering flexible, personalized solutions for customer relations and data processing to boost growth and enhance customer interactions | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 272 | 2004 |
| 7 | [ARKADIA Group](https://www.tamtam.ai/c/arkadia-group) (arkadiagroup.fr)<br>ARKADIA Group is an independent engineering and services firm specializing in Energy and Aerospace/Transport sectors, offering expertise in large industrial projects worldwide | Business Consulting and Services | 🇫🇷 Aix-en-Provence | 214 | 2010 |
| 8 | [REACTIS Group](https://www.tamtam.ai/c/reactis-group) (reactis.fr)<br>Company helps businesses with IT projects, software development, systems maintenance, digital transformation, and application services through various flexible intervention modes. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 163 | 2001 |
| 9 | [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 |
| 10 | [Team-iT](https://www.tamtam.ai/c/team-it) (team-it.fr)<br>Specialized in IT infrastructure, cybersecurity, DevOps, cloud, project management, and ITIL process management for large corporate clients. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 135 | 2014 |
| 11 | [Reel IT Groupe](https://www.tamtam.ai/c/reel-it-groupe) (reelit.fr)<br>REEL IT Group, founded by digital transformation experts, offers a diverse range of solutions to drive businesses forward through digital transformation | Computer Networking Products | 🇫🇷 Aix-en-Provence | 120 | 2019 |
| 12 | [Amesys Conseil](https://www.tamtam.ai/c/amesys-conseil) (amesys-conseil.fr)<br>Consulting and industrial group specializing in Defense & aerospace, aeronautics, transportation, RF, and homeland security markets with consistent growth and profitability | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 118 | 1979 |
| 13 | [Systerel](https://www.tamtam.ai/c/systerel) (systerel.fr)<br>Systerel specializes in developing innovative solutions for safety critical systems using advanced technologies and rigorous processes for various industries | Software Development | 🇫🇷 Aix-en-Provence | 107 | 2001 |
| 14 | [CS in Defense & Security](https://www.tamtam.ai/c/cs-in-defense-and-security) (cs-soprasteria.com)<br>Leading prime contractor specializing in design, integration, and operation of turnkey systems for critical applications in space, defense, aeronautics, and energy sectors worldwide | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 103 | 1996 |
| 15 | [Season](https://www.tamtam.ai/c/season) (season-ed.com)<br>Development of agile, Salesforce-based cloud software solutions for higher education institutions focusing on contact and interaction management. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 71 | 2018 |
| 16 | [AMS GROUPE](https://www.tamtam.ai/c/ams-groupe) (ams-groupe.com)<br>AMS Group, established in 2008, specializes in operational management in Quality, Safety, Environment, offering systemic and societal managerial support in 5 expertise areas | Business Consulting and Services | 🇫🇷 Aix-en-Provence | 65 | 2008 |
| 17 | [Nova Law Firm](https://www.tamtam.ai/c/nova-law-firm) (novapartners.net)<br>A specialized law firm in France offering corporate finance, real estate, and restructuring services with a strong international focus and experienced multidisciplinary team | Law Practice | 🇫🇷 Aix-en-Provence | 61 | 2012 |
| 18 | [LAURALBA CONSEIL](https://www.tamtam.ai/c/lauralba-conseil) (lauralba.net)<br>Support SMEs and large companies with IT expert recruitment and development, focusing on employee desires to ensure mission fit and retention. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 51 | 1998 |
| 19 | [EXPANSI Avocats & Experts-Comptables](https://www.tamtam.ai/c/expansi-avocats-and-experts-comptables) (expansi.fr)<br>A team of accounting, audit, legal professionals offering comprehensive services and advice to businesses, focusing on current entrepreneur needs in a digital, evolving environment | Financial Services | 🇫🇷 Aix-en-Provence | 47 | 2017 |
| 20 | [Sabena Technics ATP](https://www.tamtam.ai/c/sabena-technics-atp) (aerotechpro.com)<br>AeroTech Pro offers diverse aeronautics services globally, including technical assistance, MRO services, life cycle service, and mission services with highly trained personnel | Aviation and Aerospace Component Manufacturing | 🇫🇷 Aix-en-Provence | 43 | 2010 |
| 21 | [Direct Fleet](https://www.tamtam.ai/c/direct-fleet) (direct-fleet.com)<br>Direct Fleet offers independent expertise in vehicle fleet management, including consulting services and delegated fleet management for increased productivity and efficiency | Motor Vehicle Manufacturing | 🇫🇷 Aix-en-Provence | 42 | 2010 |
| 22 | [The Hive Company](https://www.tamtam.ai/c/the-hive-company) (the-hive-company.fr)<br>Consulting firm specializing in IT engineering, delivering tailored data, DevOps, SecOps, cloud, and infrastructure solutions with agile, collaborative, and sustainable values. | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 42 |  |
| 23 | [acpqualife](https://www.tamtam.ai/c/acpqualife) (acpqualife.com)<br>Acpqualife is an ESN subsidiary of the HPS Group, offering consulting, testing, project management, infrastructure services, training, and software solutions in monetics | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 42 | 2002 |
| 24 | [SYAGE](https://www.tamtam.ai/c/syage) (syage.fr)<br>The company specializes in IT consulting and services, offering expertise in infrastructure, networks, security, HR management, recruitment, and skills delegation | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 40 | 2007 |
| 25 | [Numa Avocats](https://www.tamtam.ai/c/numa-avocats) (numaavocats.com)<br>Provides integrated legal, fiscal, and social advice to SMEs, entrepreneurs, and institutions for complex strategic business operations. | Law Practice | 🇫🇷 Aix-en-Provence | 37 | 2019 |
| 26 | [AMD](https://www.tamtam.ai/c/amd-aix-en-provence) (amd-creation.com)<br>With over 20 years of experience, this company in Aix-en-Provence provides expert communication advice to strengthen businesses' image | Advertising Services | 🇫🇷 Aix-en-Provence | 37 |  |
| 27 | [ALBERTAS NOTAIRES](https://www.tamtam.ai/c/albertas-notaires) (etude-albertas-notaires.fr)<br>Established in 1600 in Aix en Provence, offering notarial services in a historic building with a team specializing in real estate, business, family law, and asset management | Legal Services | 🇫🇷 Aix-en-Provence | 36 | 1600 |
| 28 | [AddixGroup](https://www.tamtam.ai/c/addixgroup) (addixgroup.fr)<br>AddixGroup assists businesses in successful digital transformation with consulting, development, and delegation of skills in IT, data, and cloud services | IT Services and IT Consulting | 🇫🇷 Aix-en-Provence | 34 | 2011 |
| 29 | [DRUJON d'ASTROS & Associés](https://www.tamtam.ai/c/drujon-d-astros-and-associes) (drujondastros-avocats.com)<br>A multidisciplinary law firm providing comprehensive legal services in various fields including labor law, commercial law, family law, and more | Law Practice | 🇫🇷 Aix-en-Provence | 22 |  |
| 30 | [NOVALFI \| Patrimoine](https://www.tamtam.ai/c/novalfi-patrimoine) (novalfi.com)<br>A multidisciplinary team of experts providing consulting services to help clients address their specific challenges and overall strategies effectively | Legal Services | 🇫🇷 Aix-en-Provence | 22 |  |

## 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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## The same list elsewhere in France

- [Professional services firms in France](https://www.tamtam.ai/l/professional-services-firms-france) (6,610)
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- [Professional services firms in the Rhône department](https://www.tamtam.ai/l/professional-services-firms-rhone) (400)
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## The same list elsewhere

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Source: https://www.tamtam.ai/l/professional-services-firms-aix-en-provence