# 100 leading professional services firms in Grand Est

Tamtam tracks 316 professional services firms headquartered in Grand Est. This list ranks the 100 largest by number of employees on LinkedIn, led by Astek, Air France Industries KLM Engineering & Maintenance and Euro Information Developpements / EID. Their median headcount is 330. Half of them were founded in 1992 or later. The most common headquarters are Strasbourg (11), Reims (5) and Metz (4).

These professional services firms in Grand Est are mainly large enterprises, with a strong presence in IT services and industrial engineering. Astek supports digital transformation, while Euro Information Developpements provides IT systems for banks. Clemessy specializes in electrical and mechanical engineering, and Technology & Strategy offers engineering and digital consulting. Omexom focuses on power grid solutions, and Axima Réfrigération France is an industrial refrigeration specialist.

The companies listed show a mix of sectors. While IT services and industrial engineering are prominent, there are also firms like SUPPLAY in staffing and recruiting, and BNP Paribas Wealth Management in banking. The presence of companies like Groupe Ponticelli Frères, founded in 1921, and Axima Réfrigération France, founded in 1876, indicates a strong historical industrial base.

🇫🇷 Grand Est · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Astek](https://www.tamtam.ai/c/astek) (astekgroup.fr)<br>Supports clients with high-value service, deep technical expertise across technology, operations, and engineering, focusing on sustainable digital transformation with humans at the core. | IT Services and IT Consulting | 🇫🇷 Boulogne-Billancourt | 6,035 | 1988 |
| 2 | [Air France Industries KLM Engineering & Maintenance](https://www.tamtam.ai/c/air-france-industries-klm-engineering-and-maintenance) (afiklmem.com)<br>Provides comprehensive aircraft maintenance, repair, and overhaul services, focusing on air safety, operational management, cost minimization, and technical excellence with an extensive track record. | Airlines and Aviation | 🇫🇷 Roissy en France | 3,989 |  |
| 3 | [Euro Information Developpements / EID](https://www.tamtam.ai/c/euro-information-developpements-eid) (e-i.com)<br>IT subsidiary of a bank-insurance group, designing, building, maintaining, and operating an information system unit for affiliated banks with 2300 employees across various locations | Software Development | 🇫🇷 Strasbourg | 3,624 | 1978 |
| 4 | [Clemessy](https://www.tamtam.ai/c/clemessy) (clemessy.com)<br>Specializing in electrical and mechanical engineering, Clemessy designs, installs, and maintains systems for various industries worldwide, with a strong focus on industrial installations | Automation Machinery Manufacturing | 🇫🇷 Mulhouse | 2,405 |  |
| 5 | [Technology & Strategy](https://www.tamtam.ai/c/technology-and-strategy) (tands.com)<br>Provides engineering, digital, and consulting services, developing innovative projects for industrial, automotive, and financial sectors with a focus on human values and global presence. | IT Services and IT Consulting | 🇫🇷 Schiltigheim | 2,370 | 2008 |
| 6 | [Twoday](https://www.tamtam.ai/c/twoday) (twoday.com)<br>Providing AI-driven software engineering and business applications to help public and private sectors make better decisions and create meaningful change. | IT Services and IT Consulting | 🇫🇷 | 2,347 | 2022 |
| 7 | [Groupe Ponticelli Frères](https://www.tamtam.ai/c/groupe-ponticelli-freres) (ponticelli.com)<br>Provides mechanical, piping, and lifting services globally, designing, building, modernizing, and maintaining production installations for energy, industrial, and infrastructure sectors. | Industrial Machinery Manufacturing | 🇫🇷 | 2,220 | 1921 |
| 8 | [SUPPLAY](https://www.tamtam.ai/c/supplay) (supplay.fr)<br>Providing responsible and flexible staffing solutions to support economic actors in adapting to change, while prioritizing skill development and corporate social responsibility | Staffing and Recruiting | 🇫🇷 Reims | 2,192 | 1968 |
| 9 | [BNP Paribas Wealth Management](https://www.tamtam.ai/c/bnp-paribas-wealth-management) (wealthmanagement.bnpparibas)<br>Leading global private bank, supporting high-net-worth individuals, entrepreneurs, and families in protecting, growing, and passing on their assets, aiming for a sustainable future. | Banking | 🇫🇷 Paris | 2,186 |  |
| 10 | [Smile](https://www.tamtam.ai/c/smile) (smile.eu)<br>This company offers open-source digital services, including e-commerce platforms, business applications, and data management, to enhance client businesses with reliable technology decisions. | IT Services and IT Consulting | 🇫🇷 Asnières sur seine | 2,040 | 1991 |
| 11 | [Omexom](https://www.tamtam.ai/c/omexom) (omexom.com)<br>Specializing in power grid solutions, Omexom helps clients navigate the energy transition by integrating renewable energy, storage solutions, and smart infrastructures Independently selecting optimal technologies | Electric Power Transmission, Control, and Distribution | 🇫🇷 | 1,825 | 2000 |
| 12 | [Ginger](https://www.tamtam.ai/c/ginger-ay-champagne) (groupeginger.com)<br>Leader in independent engineering, specializing in soil, water, material, and environmental engineering, securing projects, optimizing durability, and integrating them environmentally. | Business Consulting and Services | 🇫🇷 Élancourt | 1,777 | 1933 |
| 13 | [Axima Réfrigération France](https://www.tamtam.ai/c/axima-refrigeration-france) (equans.fr)<br>Industrial refrigeration specialist providing installation and maintenance services for food industries, retail, logistics, and chemistry through a network of eighty French regional agencies. | HVAC and Refrigeration Equipment Manufacturing | 🇫🇷 Bischheim | 1,690 | 1876 |
| 14 | [A2micile Europe](https://www.tamtam.ai/c/a2micile-europe) (rassemblons-nos-talents.com)<br>Network of over 100 agencies providing personal home care services across France, employing more than 3,000 staff members. | Individual and Family Services | 🇫🇷 Strasbourg | 1,660 | 2005 |
| 15 | [Stelliant](https://www.tamtam.ai/c/stelliant) (stelliant.com)<br>Leading provider of insurance services, assisting individuals, professionals, businesses, and insurers with risk management, claims, and prevention across France and internationally. | Insurance | 🇫🇷 Puteaux | 1,573 | 1987 |
| 16 | [Start People France](https://www.tamtam.ai/c/start-people-france) (startpeople.fr)<br>Specializes in recruiting, selecting, and placing trained, motivated personnel in permanent, temporary, or fixed-term contracts across France. | Staffing and Recruiting | 🇫🇷 St Julien les Metz | 1,385 |  |
| 17 | [Capfinances](https://www.tamtam.ai/c/capfinances-ay-champagne) (capfinances.fr)<br>Capfinances is an insurance broker specializing in wealth solutions, retirement savings, and protection for individuals and professionals, with a national presence | Insurance Agencies and Brokerages | 🇫🇷 Bois-Guillaume | 1,142 | 2004 |
| 18 | [SIS](https://www.tamtam.ai/c/sis-woippy)<br>A leading company in sanitation services (maintenance, control, rehabilitation) in the Grand Est region with 700 employees serving individuals, communities, and industries | Environmental Services | 🇫🇷 Woippy | 1,068 |  |
| 19 | [Citeos](https://www.tamtam.ai/c/citeos) (citeos.fr)<br>Citeos specializes in urban lighting, urban equipment, and connected services for cities and communities, offering customized solutions and comprehensive management | Environmental Services | 🇫🇷 | 943 |  |
| 20 | [Expectra](https://www.tamtam.ai/c/expectra) (randstadprofessional.fr)<br>A leading French company specializing in temporary staffing and recruitment of professionals offering expertise in IT, engineering, finance, sales, HR, and law | Human Resources Services | 🇫🇷 La Plaine St Denis | 920 | 1999 |
| 21 | [Onet Sécurité](https://www.tamtam.ai/c/onet-securite) (onet.fr)<br>Company offers human and electronic security solutions, including remote surveillance, video protection, audit, and consulting, mastering engineering to operation for various sites. | Security and Investigations | 🇫🇷 Marseille | 889 | 1860 |
| 22 | [Alpes Contrôles](https://www.tamtam.ai/c/alpes-controles) (alpes-controles.fr)<br>Support clients regulatory compliance construction, safety coordination, environmental protection, diagnostics, training, certification, with ethical governance and societal responsibility. | Construction | 🇫🇷 | 856 | 1988 |
| 23 | [EY Société d'Avocats](https://www.tamtam.ai/c/ey-societe-d-avocats) (ey.com)<br>Provides legal and tax advisory services in France with expertise in tax, social law, business law, and international mobility management. | Law Practice | 🇫🇷 | 838 |  |
| 24 | [SUP INTERIM](https://www.tamtam.ai/c/sup-interim) (supinterim.fr)<br>Staffing agency specializing in temporary work, fixed-term, and permanent contracts across various sectors like construction, logistics, and industry throughout France and Luxembourg. | Staffing and Recruiting | 🇫🇷 Golbey | 837 | 1985 |
| 25 | [AFNOR Certification](https://www.tamtam.ai/c/afnor-certification) (afnor.org)<br>This company is certified with NF Service in France and Service in Europe, ensuring high quality and standards in its operations | Business Consulting and Services | 🇫🇷 | 669 | 1989 |
| 26 | [FCN](https://www.tamtam.ai/c/fcn) (fcn.fr)<br>Expertise comptable and commissariat aux comptes services provided by 400 professionals across 20 offices in France, with international membership in MGI association. | Accounting | 🇫🇷 Bezannes | 664 | 1945 |
| 27 | [CDER : Expertise comptable et conseil](https://www.tamtam.ai/c/cder-expertise-comptable-et-conseil) (cder.fr)<br>Provides accounting, tax, legal, and social advisory services to farmers, artisans, small businesses, professionals, and individuals with expert support. | Accounting | 🇫🇷 Châlons-en-Champagne | 660 | 1956 |
| 28 | [Asdia](https://www.tamtam.ai/c/asdia) (asdia.fr)<br>ASDIA is a patient-centered company providing holistic care and education for diabetic and chronically ill patients, focusing on human values and expertise | Home Health Care Services | 🇫🇷 Strasbourg | 637 |  |
| 29 | [Athome](https://www.tamtam.ai/c/athome) (athome.fr)<br>Specializes in outsourcing email and paper mail for property managers. Handles electronic and postal mailings, notices, and collections. Provides tracking, archiving, and personalized support. | Administrative and Support Services | 🇫🇷 Fontenay-sous-Bois | 635 | 1987 |
| 30 | [Pentalog](https://www.tamtam.ai/c/pentalog) (globant.com)<br>A global IT service platform under Globant, offering design, development, and marketing services, with agile methodologies and a focus on product value | Software Development | 🇫🇷 Paris | 614 | 1993 |
| 31 | [SGP Sécurité](https://www.tamtam.ai/c/sgp-securite) (groupesgp.fr)<br>Provides human surveillance, reception, training, and technological security solutions for industrial, institutional, and complex high-security sectors across France and internationally. | Security and Investigations | 🇫🇷 Metz | 608 | 2005 |
| 32 | [Groupe Menway](https://www.tamtam.ai/c/groupe-menway) (groupemenway.com)<br>Independent human resources actor, federating complementary expertise in HR to meet organizational challenges, supporting individuals throughout their professional lives. | Human Resources Services | 🇫🇷 Metz | 604 | 2002 |
| 33 | [ADIS](https://www.tamtam.ai/c/adis) (adis-assurances.com)<br>Management center for insured association specializing in retirement, savings, provident, and health insurance serving over 700,000 members. | Insurance | 🇫🇷 Schiltigheim | 559 | 1980 |
| 34 | [julhiet sterwen](https://www.tamtam.ai/c/julhiet-sterwen) (julhiet-sterwen.com)<br>Key player in management, human resources and operational consulting. Blends talent and business know-how, accelerating companies’ competitiveness through practical, innovative, digital solutions. | Business Consulting and Services | 🇫🇷 Neuilly-sur-Seine | 548 | 2015 |
| 35 | [Hervé Schauer Consultants (HSC)](https://www.tamtam.ai/c/herve-schauer-consultants-hsc) (hs2.fr)<br>Provides information security consulting, audits, penetration tests, risk management, and training services to secure diverse infrastructures and systems. | Computer and Network Security | 🇫🇷 Neuilly-sur-Seine | 500 | 1989 |
| 36 | [ARTUS ONSITE](https://www.tamtam.ai/c/artus-interim-and-solutions-rh) (artus-interim.com)<br>A family-owned HR services company with over 30 years of experience, offering temporary staffing, recruitment, training, and workforce management solutions across various sectors | Human Resources Services | 🇫🇷 Tours | 460 | 1992 |
| 37 | [SODI Maintenance et Services Industriels](https://www.tamtam.ai/c/sodi-maintenance-et-services-industriels) (sodi.fr)<br>Provides comprehensive industrial maintenance and cleaning services, specializing in high-pressure cleaning and petroleum work across various sectors like chemicals, refining, and automotive. | Industrial Machinery Manufacturing | 🇫🇷 Châteauneuf-les-Martigues | 431 |  |
| 38 | [Groupe DLSI](https://www.tamtam.ai/c/groupe-dlsi) (groupedlsi.com)<br>Provides temporary staffing and human resource management services across multiple sectors in France, Luxembourg, Germany, Poland, and Switzerland. | Human Resources Services | 🇫🇷 Forbach | 420 | 1992 |
| 39 | [CERFRANCE Poitou-Charentes](https://www.tamtam.ai/c/cerfrance-poitou-charentes) (poitoucharentes.cerfrance.fr)<br>Provides accounting expertise and business consulting services to entrepreneurs, supporting company creation, management, and succession in Poitou-Charentes. | Accounting | 🇫🇷 | 403 | 1956 |
| 40 | [ICC Arbitration](https://www.tamtam.ai/c/icc-arbitration) (iccwbo.org)<br>Supervises and administers arbitration proceedings under ICC Rules, offering a reliable alternative to court litigation for international disputes, without nationality restrictions. | Non-profit Organizations | 🇫🇷 Paris | 401 | 1923 |
| 41 | [Yzico](https://www.tamtam.ai/c/yzico) (yzico.fr)<br>Provides support to entrepreneurs in the Grand Est region, leveraging deep local knowledge to navigate a constantly changing business environment. | Accounting | 🇫🇷 | 398 |  |
| 42 | [IZI confort, groupe EDF](https://www.tamtam.ai/c/izi-confort-groupe-edf) (izi-by-edf-entretien.fr)<br>Specialist in maintenance, servicing, and replacement of thermal heating installations for residential and commercial customers as part of the EDF Group. | Repair and Maintenance | 🇫🇷 Massy | 391 | 2003 |
| 43 | [CSA (Institut d'Etudes)](https://www.tamtam.ai/c/csa-institut-d-etudes) (csa.eu)<br>Provides companies and institutions understanding of consumer behaviors, analyzes environments, anticipates changes, and identifies engagement pathways for clear decision-making processes. | Market Research | 🇫🇷 Puteaux | 384 |  |
| 44 | [SODEXO JUSTICE SERVICES](https://www.tamtam.ai/c/sodexo-justice-services)<br>Based in Guyancourt, Île-de-France, France, this retail company operates from 6 Rue de la Redoute. No further details about specific products or services provided. | Retail | 🇫🇷 Guyancourt | 361 |  |
| 45 | [COMETZ](https://www.tamtam.ai/c/cometz) (cometz.fr)<br>Offering outsourced solutions to large organizations looking for new sources of revenue and savings, focusing on customer relationship management and diversity | Telecommunications | 🇫🇷 Metz | 353 | 2000 |
| 46 | [B-Hive Engineering](https://www.tamtam.ai/c/b-hive-engineering) (b-hive.fr)<br>Offers innovative and effective engineering solutions across diverse sectors including energy, transport, telecom, life sciences, industry, construction, and IT. | Business Consulting and Services | 🇫🇷 Mulhouse | 352 | 2017 |
| 47 | [Lustral](https://www.tamtam.ai/c/lustral) (lustral.fr)<br>Certified cleaning and facility services for tertiary, industrial, and healthcare sectors across France, Switzerland, and Tunisia, focusing on outsourcing and CSR optimization. | Janitorial Services | 🇫🇷 Reims | 344 | 1959 |
| 48 | [Groupe OTE](https://www.tamtam.ai/c/groupe-ote) (ote-ingenierie.com)<br>Multidisciplinary building engineering firm providing smart, long-lasting solutions across diverse sectors including industrial, pharmaceutical, data centers, and healthcare, combining advanced techniques and specialized entities. | Engineering Services | 🇫🇷 Illkirch-Graffenstaden | 341 | 1962 |
| 49 | [Novalix](https://www.tamtam.ai/c/novalix) (novalix.com)<br>Fully integrated drug discovery CRO offering support from target identification to preclinical candidates, specializing in medicinal chemistry, pharmacology, and biophysical techniques | Biotechnology Research | 🇫🇷 Strasbourg | 331 | 2002 |
| 50 | [Menway Emploi](https://www.tamtam.ai/c/menway-emploi) (menwayemploi.com)<br>Menway Emploi offers permanent and temporary recruitment services, including internships, CDDs, and CDIs across various industries to support career aspirations | Human Resources Services | 🇫🇷 Metz | 330 | 2002 |
| 51 | [CLEEVEN](https://www.tamtam.ai/c/cleeven) (cleeven.com)<br>Offers engineering consulting services, focusing on delivering exceptional technical skills and human qualities to support clients in achieving their project goals. | Research Services | 🇫🇷 Lyon | 328 | 2015 |
| 52 | [Batt & Associés](https://www.tamtam.ai/c/batt-and-associes) (batt.eu)<br>Provides expert management and specialist support in bookkeeping, business advice, and tailored solutions for business sales and transfers. | Accounting | 🇫🇷 Nancy | 323 | 1971 |
| 53 | [WeMa](https://www.tamtam.ai/c/wema) (wema.fr)<br>Company operates multiple offices in various French cities, providing regional presence and local services across northeastern and central France. | Accounting | 🇫🇷 Strasbourg | 316 | 1947 |
| 54 | [IDEA France - Expertise automobile](https://www.tamtam.ai/c/idea-france-expertise-automobile) (idea-expertises.com)<br>Network of automotive experts providing damage assessment and repair evaluation for all motorized land and maritime vehicles across France. | Insurance | 🇫🇷 Cagnes sur mer | 308 | 2014 |
| 55 | [CERFRANCE Champagne Nord Est Ile de France](https://www.tamtam.ai/c/cerfrance-champagne-nord-est-ile-de-france) (cerfrance.fr)<br>Multidisciplinary association providing accounting, legal, and strategic advisory services to small businesses, farmers, and artisans across France through a local agency network. | Accounting | 🇫🇷 REIMS Cedex 3 | 303 |  |
| 56 | [Next Décision](https://www.tamtam.ai/c/next-decision) (next-decision.fr)<br>A consulting firm specializing in business intelligence technologies, serving various industries in Western France with a focus on providing functional services to users | IT Services and IT Consulting | 🇫🇷 Nantes | 277 | 2010 |
| 57 | [Afigec](https://www.tamtam.ai/c/afigec) (afigec.com)<br>Multi-skilled accounting firm, 40 years experience, 21 partners, 300 employees, offices in Paris, Lyon, Normandy, national player, international reach, 4400 clients. | Accounting | 🇫🇷 Paris - Levallois Perret | 275 | 1982 |
| 58 | [Confédération Nationale des Junior-Entreprises](https://www.tamtam.ai/c/confederation-nationale-des-junior-entreprises) (junior-entreprises.com)<br>Enables students to gain professional experience by completing projects for clients, fostering skill development and real-world application. | Non-profit Organizations | 🇫🇷 Paris | 272 | 1969 |
| 59 | [Harry Hope.](https://www.tamtam.ai/c/harry-hope) (harry-hope.com)<br>Recruitment consultants with extensive experience and networks finding talent across various sectors for clients globally, matching candidates to roles and companies. | Staffing and Recruiting | 🇫🇷 Nancy | 270 | 2019 |
| 60 | [DER](https://www.tamtam.ai/c/der) (groupe-der.com)<br>Specialized in building control, using infiltrometry and thermography to detect thermal losses, validate RT2012 and BBC labels, working on various projects | Environmental Services | 🇫🇷 Saint-Louis | 264 |  |
| 61 | [DIOT](https://www.tamtam.ai/c/diot) (diot-siaci.com)<br>A leading independent insurance brokerage in France and abroad, serving large corporations with a diverse range of specialties and international support in 135 countries | Insurance | 🇫🇷 | 261 |  |
| 62 | [IRH INGENIEUR CONSEIL](https://www.tamtam.ai/c/irh-ingenieur-conseil) (anteagroup.fr)<br>International engineering and environmental consulting firm serving diverse clients worldwide with expertise in environmental solutions and sustainable development. | Environmental Services | 🇫🇷 Ludres | 261 |  |
| 63 | [Polycea](https://www.tamtam.ai/c/polycea) (polyconseil.fr)<br>Offers comprehensive digital transformation support to clients, developing high-value technical solutions and ambitious, state-of-the-art systems for various organizations. | IT Services and IT Consulting | 🇫🇷 Paris | 252 | 1989 |
| 64 | [Menco](https://www.tamtam.ai/c/menco) (menco-rh.fr)<br>Independent, human-sized temporary staffing and recruitment company operating in all business sectors, connecting talent with opportunities across diverse industries. | Staffing and Recruiting | 🇫🇷 Bouguenais | 249 | 2013 |
| 65 | [TECSOL](https://www.tamtam.ai/c/tecsol) (tecsol.fr)<br>Independent solar engineering firm specializing in solar energy solutions and designs | Environmental Services | 🇫🇷 | 248 | 1982 |
| 66 | [HSD Human Resource Solutions](https://www.tamtam.ai/c/hsd-human-resource-solutions) (hsd-melt.com)<br>Specializes in recruitment, temporary staffing, payroll management, and professional training across Europe and Sub-Saharan Africa with local market expertise. | Human Resources Services | 🇫🇷 Mouzon | 238 |  |
| 67 | [ACD AVOCATS](https://www.tamtam.ai/c/acd-avocats) (acd.fr)<br>Full-service legal support for companies across corporate, commercial, tax, and labor law, specializing in business development, innovation, restructuring, and collective proceedings. | Law Practice | 🇫🇷 Nancy | 226 | 1959 |
| 68 | [Hexanet](https://www.tamtam.ai/c/hexanet) (hexanet.fr)<br>A Reims-based team of internet, network, and telecommunications professionals offering specialized services such as telecom, unified telephony, hosting, and more | IT Services and IT Consulting | 🇫🇷 Reims | 225 | 1997 |
| 69 | [BDL - Expertise comptable, audit & conseil](https://www.tamtam.ai/c/bdl-expertise-comptable-audit-and-conseil) (bdl-experts.com)<br>Accounting, audit, and consulting services for businesses in northern France, managing thirty years of expertise with three hundred staff and monthly payroll processing. | Accounting | 🇫🇷 Valenciennes | 224 | 1993 |
| 70 | [Ricoh Industrie France S.A.S](https://www.tamtam.ai/c/ricoh-industrie-france-s-a-s) (ricoh-thermal.com)<br>A global technology company offering innovative services and technologies in document management, IT services, printing solutions, visual communications, digital cameras, and industrial systems for 80 years | IT Services and IT Consulting | 🇫🇷 Wettolsheim | 205 | 1987 |
| 71 | [GROUPE COFIME](https://www.tamtam.ai/c/groupe-cofime) (hlb-groupecofime.com)<br>Provides comprehensive accounting, auditing, legal, and social expertise alongside strategic business consulting, wealth management, and international development support through a specialized professional network. | Accounting | 🇫🇷 Colmar | 202 | 1963 |
| 72 | [Hans & associés](https://www.tamtam.ai/c/hans-and-associes) (hans-associes.fr)<br>Independent group with 400+ experts supporting over 9,000 companies across diverse sectors including agriculture, health, construction, and services. | Accounting | 🇫🇷 Bollwiller | 198 | 1985 |
| 73 | [Sofitex](https://www.tamtam.ai/c/sofitex-mulhouse) (sofitex.fr)<br>With over 30 years in HR, this international network specializes in temporary work and permanent placements throughout France, Germany, Switzerland, and Luxembourg | Staffing and Recruiting | 🇫🇷 Mulhouse | 194 | 1992 |
| 74 | [GROUPE MORGAN SERVICES Château-Thierry](https://www.tamtam.ai/c/groupe-morgan-services-chateau-thierry) (groupe-morgan-services.fr)<br>Specialist in recruitment and temporary personnel placement since 1972, providing staffing solutions through an extensive network of over ninety regional office branches. | Staffing and Recruiting | 🇫🇷 Chateau Thierry | 185 |  |
| 75 | [BS Engineering](https://www.tamtam.ai/c/bs-engineering) (bse-engineering.com)<br>Partnering with construction players in civil engineering, transport infrastructure, energy, general installation, nuclear, and IT sectors. | Engineering Services | 🇫🇷 Reims | 184 | 2018 |
| 76 | [E'nergys](https://www.tamtam.ai/c/e-nergys) (e-nergys.com)<br>Network of SMEs developing innovative solutions and services focused on water management and energy performance using digital technologies. | Environmental Services | 🇫🇷 Benfeld | 181 | 2014 |
| 77 | [FINVENS](https://www.tamtam.ai/c/finvens) (finvens.fr)<br>With over 20 years in financing for individuals, this company is the 3rd largest in France for credit consolidation, focusing on innovative solutions and team collaboration | Financial Services | 🇫🇷 Toulouse | 178 | 1988 |
| 78 | [C'PRO](https://www.tamtam.ai/c/c-pro) (koesio.com)<br>Provides printing, IT, and telecom solutions. Local agencies ensure proximity service. Management prioritizes employee development, fostering a great workplace culture for staff and clients. | IT Services and IT Consulting | 🇫🇷 Valence | 178 | 1991 |
| 79 | [Groupe BS - Bouchers Services - F2o - AgiliT](https://www.tamtam.ai/c/groupe-bs-bouchers-services-f2o-agilit) (groupe-bs.com)<br>Specialist in the food industry. Activities include meat processing, recruitment and training, and innovative solutions, with over 30 years of family history. | Food and Beverage Manufacturing | 🇫🇷 Rennes | 175 |  |
| 80 | [Groupe GISMIC](https://www.tamtam.ai/c/groupe-gismic) (groupegismic.com)<br>Provides expert quality assurance, control, and inspection services for diverse industries like oil & gas, energy, and construction projects globally, ensuring project integrity. | Mechanical Or Industrial Engineering | 🇫🇷 Ars-Laquenexy | 169 | 2008 |
| 81 | [Athéo Ingénierie](https://www.tamtam.ai/c/atheo-ingenierie) (atheo.net)<br>Provides infrastructure engineering services with a diverse team of architects, engineers, and technicians skilled in construction and software tools. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 163 | 2013 |
| 82 | [THEDRA](https://www.tamtam.ai/c/thedra) (thedra.fr)<br>company specializes in temporary staffing for hotels and restaurants, providing daily support to ensure quality service and facilitate management for establishments. | Human Resources Services | 🇫🇷 Rennes | 163 |  |
| 83 | [GEZIM Emploi](https://www.tamtam.ai/c/gezim-emploi) (gezim.fr)<br>Provides temporary staffing and recruitment services across France, Germany, and Luxembourg, specializing in technical trades, tertiary sectors, and the hotel and catering industry since 1971. | Staffing and Recruiting | 🇫🇷 Strasbourg | 161 | 1971 |
| 84 | [Premista](https://www.tamtam.ai/c/premista) (premista.fr)<br>A key player in banking intermediation, the group represents major French banks through its agencies | Financial Services | 🇫🇷 Gondreville | 160 |  |
| 85 | [FIBA - Experts-comptables](https://www.tamtam.ai/c/fiba-experts-comptables) (groupe-fiba.fr)<br>Regional accounting firm offering expertise & advice to businesses, audit services, and personal consulting Specializing in all aspects of company and private financial management | Accounting | 🇫🇷 Schiltigheim | 157 | 1969 |
| 86 | [MONTEC](https://www.tamtam.ai/c/montec) (montec.fr)<br>Specialized company in equipment installation, industrial maintenance, piping, welding, and aeronautical works for over 20 years Operating in France and Germany | Machinery Manufacturing | 🇫🇷 Saint-Avold | 152 | 1997 |
| 87 | [NextRoad](https://www.tamtam.ai/c/nextroad) (nextroad.com)<br>Supporting infrastructure managers with building, knowing, and maintaining sustainable assets across two divisions: Roads & Works of Art, and Equipment. | Engineering Services | 🇫🇷 Fontaine-lès-Dijon | 148 | 2017 |
| 88 | [Adheo](https://www.tamtam.ai/c/adheo) (adheo.fr)<br>A leading accounting firm in Lorraine, providing comprehensive services to small businesses with expertise in accounting, consulting, payroll, and training | Accounting | 🇫🇷 Laxou | 148 | 2006 |
| 89 | [Kelyps INTERIM](https://www.tamtam.ai/c/kelyps-interim) (kelyps-interim.com)<br>Connecting businesses and candidates, a dynamic team supports projects. Specializing in matching companies with suitable individuals to fulfill staffing needs effectively. | Staffing and Recruiting | 🇫🇷 Andrézieux-Bouthéon | 139 | 2018 |
| 90 | [SECAL](https://www.tamtam.ai/c/secal) (secal.fr)<br>Provides accounting, auditing, management consulting, evaluation, and innovation support services to clients in the Eastern region since 1963. | Accounting | 🇫🇷 Strasbourg | 136 | 1963 |
| 91 | [Qualtech Groupe](https://www.tamtam.ai/c/qualtech-groupe) (qualtech-groupe.com)<br>Companies optimize service offerings in research, analysis, consulting, and training to meet client demands, with innovative technical infrastructure and industrial pilots. | Food and Beverage Manufacturing | 🇫🇷 Vandœuvre-lès-Nancy | 134 | 1994 |
| 92 | [Groupe Candor](https://www.tamtam.ai/c/groupe-candor) (groupecandor.com)<br>The company specializes in hygiene, cleanliness, and related services, emphasizing quality, human values, and employee development to satisfy clients | Facilities Services | 🇫🇷 Val-de-Reuil | 130 | 2015 |
| 93 | [CertiNergy](https://www.tamtam.ai/c/certinergy) (certinergy.com)<br>Mobilizes for and implements energy saving actions for all energy consumers, from individuals to large companies, funded by energy suppliers through energy saving certificates. | Environmental Services | 🇫🇷 La Garenne-Colombes | 129 | 2008 |
| 94 | [Groupe Rouge Vif](https://www.tamtam.ai/c/groupe-rouge-vif) (grouperougevif.fr)<br>Advises on communication strategies, public and private territorial projects, and organizes events, focusing on human recognition and shared understanding across channels. | Advertising Services | 🇫🇷 Versailles | 114 | 1988 |
| 95 | [Actinvision](https://www.tamtam.ai/c/actinvision) (actinvision.com)<br>Provides data analysis, visualization, and advanced analytics solutions, enabling data-driven culture and strategies for organizations, serving over 300 customers. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 111 | 2014 |
| 96 | [Myonex](https://www.tamtam.ai/c/myonex) (myonex.com)<br>Global pharmaceutical packaging and logistics partner, specializing in clinical trial supply management, cold-chain solutions for ATMPs, and expert packaging services for health products | Pharmaceutical Manufacturing | 🇫🇷 Reims | 106 | 1998 |
| 97 | [SdV](https://www.tamtam.ai/c/sdv) (sdv.fr)<br>Provides flexible content management, secure hosting, custom development, and domain management to support digital projects for media and institutions. | Technology, Information and Internet | 🇫🇷 Strasbourg | 105 | 1981 |
| 98 | [CEHTRA](https://www.tamtam.ai/c/cehtra) (cehtra.com)<br>A global leader in environmental and human toxicology, offering regulatory compliance services, innovative solutions, and strategic consulting for chemical safety | Environmental Services | 🇫🇷 Cenon | 105 | 2001 |
| 99 | [Lorex](https://www.tamtam.ai/c/lorex)<br>Accounting and audit firm located in Montigny-lès-Metz providing expertise in accounting and statutory auditing services | Accounting | 🇫🇷 Montigny-lès-Metz | 101 | 1925 |
| 100 | [Digora](https://www.tamtam.ai/c/digora) (deep.eu)<br>Expert in data management, supporting companies with digital transformation, infrastructure, maintenance, and innovation for availability, performance, and security. | IT Services and IT Consulting | 🇫🇷 Strasbourg | 100 | 1997 |

## 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 Grand Est

- [The largest companies in Grand Est](https://www.tamtam.ai/l/largest-companies-grand-est) (5,706)
- [Multinational companies in Grand Est](https://www.tamtam.ai/l/multinational-companies-grand-est) (788)
- [Companies with in-house R&D in Grand Est](https://www.tamtam.ai/l/r-and-d-companies-grand-est) (640)
- [Manufacturers in Grand Est](https://www.tamtam.ai/l/manufacturers-grand-est) (573)
- [Retail chains in Grand Est](https://www.tamtam.ai/l/retail-chains-grand-est) (530)
- [Public sector organisations in Grand Est](https://www.tamtam.ai/l/public-sector-organisations-grand-est) (427)
- [Family-owned companies in Grand Est](https://www.tamtam.ai/l/family-owned-companies-grand-est) (365)
- [Hardware manufacturers in Grand Est](https://www.tamtam.ai/l/hardware-companies-grand-est) (342)
- [Distributors and wholesalers in Grand Est](https://www.tamtam.ai/l/distributors-and-wholesalers-grand-est) (307)
- [Critical infrastructure operators in Grand Est](https://www.tamtam.ai/l/critical-infrastructure-operators-grand-est) (259)
- [IT services companies in Grand Est](https://www.tamtam.ai/l/it-services-companies-grand-est) (248)
- [SaaS companies in Grand Est](https://www.tamtam.ai/l/saas-companies-grand-est) (216)
- [Education providers in Grand Est](https://www.tamtam.ai/l/education-companies-grand-est) (215)
- [IT Services and IT Consulting companies in Grand Est](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-grand-est) (213)
- [Software Development companies in Grand Est](https://www.tamtam.ai/l/software-development-companies-grand-est) (211)
- [Healthcare providers in Grand Est](https://www.tamtam.ai/l/healthcare-providers-grand-est) (202)
- [Construction companies in Grand Est](https://www.tamtam.ai/l/construction-companies-grand-est) (196)
- [Contract manufacturers in Grand Est](https://www.tamtam.ai/l/contract-manufacturers-grand-est) (192)
- [Retail companies in Grand Est](https://www.tamtam.ai/l/retail-companies-grand-est) (169)
- [Government Administration companies in Grand Est](https://www.tamtam.ai/l/government-administration-companies-grand-est) (168)
- [Industrial Machinery Manufacturing companies in Grand Est](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-grand-est) (166)
- [Consulting firms in Grand Est](https://www.tamtam.ai/l/consulting-firms-grand-est) (165)
- [Food and beverage companies in Grand Est](https://www.tamtam.ai/l/food-and-beverage-companies-grand-est) (161)
- [Wholesale companies in Grand Est](https://www.tamtam.ai/l/wholesale-companies-grand-est) (159)

## The same list elsewhere in France

- [Professional services firms in France](https://www.tamtam.ai/l/professional-services-firms-france) (6,610)
- [Professional services firms in Île-de-France](https://www.tamtam.ai/l/professional-services-firms-ile-de-france) (3,377)
- [Professional services firms in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/professional-services-firms-auvergne-rhone-alpes) (711)
- [Professional services firms in the Hauts-de-Seine department](https://www.tamtam.ai/l/professional-services-firms-hauts-de-seine) (629)
- [Professional services firms in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/professional-services-firms-provence-alpes-cote-dazur) (433)
- [Professional services firms in the Rhône department](https://www.tamtam.ai/l/professional-services-firms-rhone) (400)
- [Professional services firms in Occitanie](https://www.tamtam.ai/l/professional-services-firms-occitanie) (399)
- [Professional services firms in Nouvelle-Aquitaine](https://www.tamtam.ai/l/professional-services-firms-nouvelle-aquitaine) (308)
- [Professional services firms in Hauts-de-France](https://www.tamtam.ai/l/professional-services-firms-hauts-de-france) (260)
- [Professional services firms in Pays de la Loire](https://www.tamtam.ai/l/professional-services-firms-pays-de-la-loire) (253)
- [Professional services firms in the Bouches-du-Rhône department](https://www.tamtam.ai/l/professional-services-firms-bouches-du-rhone) (249)
- [Professional services firms in the Haute-Garonne department](https://www.tamtam.ai/l/professional-services-firms-haute-garonne) (208)
- [Professional services firms in the Nord department](https://www.tamtam.ai/l/professional-services-firms-nord) (178)
- [Professional services firms in Brittany](https://www.tamtam.ai/l/professional-services-firms-brittany) (167)
- [Professional services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/professional-services-firms-loire-atlantique) (158)
- [Professional services firms in the Gironde department](https://www.tamtam.ai/l/professional-services-firms-gironde) (151)
- [Professional services firms in Normandy](https://www.tamtam.ai/l/professional-services-firms-normandy) (114)
- [Professional services firms in the Yvelines department](https://www.tamtam.ai/l/professional-services-firms-yvelines) (108)
- [Professional services firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/professional-services-firms-ille-et-vilaine) (94)
- [Professional services firms in Paris](https://www.tamtam.ai/l/professional-services-firms-paris) (2,241)
- [Professional services firms in Lyon](https://www.tamtam.ai/l/professional-services-firms-lyon) (265)
- [Professional services firms in Toulouse](https://www.tamtam.ai/l/professional-services-firms-toulouse) (139)
- [Professional services firms in Marseille](https://www.tamtam.ai/l/professional-services-firms-marseille) (123)
- [Professional services firms in Boulogne-Billancourt](https://www.tamtam.ai/l/professional-services-firms-boulogne-billancourt) (102)

## The same list elsewhere

- [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,737)
- [Professional services firms in Europe](https://www.tamtam.ai/l/professional-services-firms-in-europe) (13,698)

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Source: https://www.tamtam.ai/l/professional-services-firms-grand-est