# The 30 largest professional services firms in the Nord department Tamtam tracks 178 professional services firms headquartered in the Nord department. This list ranks the 30 largest by number of employees on LinkedIn, led by Anywr, NHOOD and Norsys. Their median headcount is 183. Half of them were founded in 2005 or later. The most common headquarters are Lille (6), Villeneuve-d'Ascq (5) and La Madeleine (3). These professional services firms in the Nord department include a mix of established companies and more recently founded businesses. Activities span human resources, real estate, IT consulting, and environmental services. Notable firms include Anywr, a global talent mobility company, NHOOD, which transforms real estate sites into living neighborhoods, Norsys, an IT consulting firm, and VERDI, a group of engineers and architects focused on sustainable territory planning. Helexia Group provides sustainable energy solutions, while CERTIFER specializes in railway testing and certification. A common pattern among these companies is their focus on specialized professional services, often with an emphasis on sustainability, technology, or complex project management. There is a concentration of headquarters in cities such as Villeneuve-d'Ascq, Wasquehal, and Lille, indicating regional hubs for professional service expertise. 🇫🇷 Nord · 30 companies · Updated Nov 11, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Anywr](https://www.tamtam.ai/c/anywr) (anywr-group.com)
A global talent mobility company offering recruitment, headhunting, and HR solutions for businesses worldwide, with a focus on diversity and social integration projects | Human Resources Services | 🇫🇷 Wasquehal | 5,035 | 2012 | | 2 | [NHOOD](https://www.tamtam.ai/c/nhood) (nhood.com)
Manage, animate, develop, and transform existing real estate sites into vibrant, connected, and human-focused living neighborhoods with positive impacts. | Real Estate | 🇫🇷 Villeneuve-d'Ascq | 1,321 | 2021 | | 3 | [Norsys](https://www.tamtam.ai/c/norsys) (norsys.fr)
Develops overall business performance. Consultants are facilitators for clients, integrating organizational, technical, and human complexities, not using pre-conceived models. | IT Services and IT Consulting | 🇫🇷 Ennevelin | 539 | 1994 | | 4 | [Azaé](https://www.tamtam.ai/c/azae) (azae.net)
Azaé is an IT service firm specializing in advanced technologies They offer agile support, architectural advice, app development, and IT system management services | IT Services and IT Consulting | 🇫🇷 Roubaix | 512 | 2011 | | 5 | [VERDI](https://www.tamtam.ai/c/verdi) (verdi.fr)
Group of engineers, architects, and environmental specialists focusing on sustainable territory planning, integrating environmental crisis and technological advances. | Environmental Services | 🇫🇷 Wasquehal | 439 | 1987 | | 6 | [EX'IM](https://www.tamtam.ai/c/ex-im) (exim.fr)
EX'IM is a national franchise network specializing in energy transition, offering a wide range of property diagnostics services with emphasis on trust and transparency | Real Estate | 🇫🇷 La Madeleine | 400 | 2002 | | 7 | [Helexia Group](https://www.tamtam.ai/c/helexia-group) (helexia.group)
Helexia provides sustainable energy solutions for industrial and commercial buildings, including energy audits, photovoltaic power plants, energy management, and electric mobility services | Services for Renewable Energy | 🇫🇷 La Madeleine | 380 | 2010 | | 8 | [NSI GROUPE](https://www.tamtam.ai/c/nsi-groupe) (nsi-groupe.com)
Provides comprehensive soft facility management services across France, encompassing cleaning, logistics, pest control, maintenance, and green spaces, with a focus on innovation and sustainability. | Janitorial Services | 🇫🇷 Marly | 366 | 2011 | | 9 | [UNIS](https://www.tamtam.ai/c/unis) (unis.fr)
A company based in France, specializing in IT systems design, implementation, and operation, prioritizing employee well-being, growth, and a qualitative approach over quantitative | Software Development | 🇫🇷 Villeneuve-d'Ascq | 344 | 1989 | | 10 | [CERTIFER](https://www.tamtam.ai/c/certifer) (certifer.eu)
Provides railway testing, inspection, and certification for urban and mainline transport systems, ensuring safety and compliance across project lifecycles globally. | Rail Transportation | 🇫🇷 Valenciennes | 326 | 1997 | | 11 | [MMMMMMMMMM](https://www.tamtam.ai/c/mmmmmmmmmm)
This independent consulting firm helps small businesses and organizations without telecom expertise make informed technology decisions through audits, consultations, and outsourcing services | Telecommunications | 🇫🇷 Leers | 302 | 2013 | | 12 | [Hiolle Technologies](https://www.tamtam.ai/c/hiolle-technologies) (hiolle-technologies.fr)
Design, production, and on-site integration of custom cabled electrical equipment with services including modification, retrofit, and troubleshooting worldwide. | Electrical Equipment Manufacturing | 🇫🇷 Prouvy | 290 | 1985 | | 13 | [BGE Hauts de France](https://www.tamtam.ai/c/bge-hauts-de-france) (bge-hautsdefrance.fr)
Support entrepreneurs with project preparation, training, financing, networking, and local expertise to increase chances of business success. | Professional Training and Coaching | 🇫🇷 Lille | 228 | 1979 | | 14 | [Emisys](https://www.tamtam.ai/c/emisys) (emisys.fr)
Specializes in project management for complex industrial projects. Offers diverse services to secure, structure, and pilot projects for various sectors. | Business Consulting and Services | 🇫🇷 Villeneuve-d'Ascq | 206 | | | 15 | [ACALY Conseil en Ingénierie](https://www.tamtam.ai/c/acaly-conseil-en-ingenierie) (acaly.eu)
The company provides technical and organizational consulting services, offers work packages for project outsourcing, and focuses on research and innovation for clients' success | Business Consulting and Services | 🇫🇷 Lille | 183 | 2015 | | 16 | [DecideOm - Expert Data & IA](https://www.tamtam.ai/c/decideom-expert-data-and-ia) (decideom.fr)
Data-focused company offering solutions from data management to data analysis, with expertise in cloud architecture, data warehousing, data visualization, and data science Providing training and consulting services | IT Services and IT Consulting | 🇫🇷 Marcq-en-Barœul | 179 | 2008 | | 17 | [ALTIMANCE](https://www.tamtam.ai/c/altimance)
Altimance is an IT service center focusing on new technologies, located in Anzin, France They aim to support future technologies and talent development | IT Services and IT Consulting | 🇫🇷 Anzin | 158 | 2017 | | 18 | [auddicé](https://www.tamtam.ai/c/auddice) (auddice.com)
Environmental consulting and training company specializing in energy transition, biodiversity, urban planning, and development of studies and recommendations | Environmental Services | 🇫🇷 Roost-Warendin | 151 | 1994 | | 19 | [Ntico](https://www.tamtam.ai/c/ntico) (ntico.com)
Provides digital services, including consulting, data, software development, IT production, network, cloud, security infrastructure, and warehouse picking optimization to clients. | IT Services and IT Consulting | 🇫🇷 Villeneuve-d'Ascq | 139 | 2010 | | 20 | [Diligentia \| Audit • Conseil • Expertise](https://www.tamtam.ai/c/diligentia-audit-conseil-expertise) (diligentia.fr)
An accounting and auditing firm in Northern France offering personalized support in accounting, taxation, legal, and social matters for businesses and professionals | Accounting | 🇫🇷 Lille | 133 | | | 21 | [RFN](https://www.tamtam.ai/c/rfn) (rfn.fr)
Support for Belgian and Dutch investors in France with accounting, taxation, social law, and clear guidance throughout investment projects. | Financial Services | 🇫🇷 Boeschepe | 132 | 1984 | | 22 | [Valoxy, Expert-Comptable mais pas que…](https://www.tamtam.ai/c/valoxy-expert-comptable-mais-pas-que) (valoxy.org)
Accounting firm founded in 2005, providing comprehensive business support in audit, legal, HR, IT, communication, recruitment, tax, management, and mergers/acquisitions across Hauts-de-France | Accounting | 🇫🇷 La Madeleine | 125 | 2005 | | 23 | [Citéo Médiation](https://www.tamtam.ai/c/citeo-mediation) (citeo.org)
Mediation and facilitation agency assisting businesses, communities, and citizens in navigating societal change through tailored guidance promoting understanding, participation, and sustainable collective action | Civic and Social Organizations | 🇫🇷 Lille | 125 | 1998 | | 24 | [Vacherand Immobilier](https://www.tamtam.ai/c/vacherand-immobilier) (vacherand.fr)
A family-owned company in the real estate sector since 1997, offering a range of services including property management, real estate transactions, and asset management | Real Estate | 🇫🇷 Lille | 125 | 1997 | | 25 | [Place des Énergies](https://www.tamtam.ai/c/place-des-energies) (placedesenergies.com)
Since 2013, a leading ally in energy management, providing expertise in negotiating electricity and gas contracts for a variety of clients | Oil and Gas | 🇫🇷 Saultain | 111 | 2013 | | 26 | [Nextoo](https://www.tamtam.ai/c/nextoo) (nextoo.fr)
Nextoo is a digital service company founded in 2002 with expertise in consulting, development, maintenance in web, mobile, and business applications | IT Services and IT Consulting | 🇫🇷 Roubaix | 104 | 2002 | | 27 | [ARGENCE DEVELOPPEMENT - Groupe Crédit Agricole](https://www.tamtam.ai/c/argence-developpement-groupe-credit-agricole) (groupecreditagricole.jobs)
A dynamic, customer-focused company providing value-added client relations expertise through call reception, back office support, and personalized complaint management for Credit Agricole Group | Financial Services | 🇫🇷 Roubaix | 103 | 1998 | | 28 | [NORD ACCESS - Solutions provider](https://www.tamtam.ai/c/nord-access-solutions-provider) (nord-access.fr)
French leader in industrial maintenance for challenging environments, offering specialized interventions in various sectors, with expert certifications and 24/7 emergency services. | Construction | 🇫🇷 Avelin | 95 | 2011 | | 29 | [Access IT](https://www.tamtam.ai/c/access-it) (access-it.fr)
Certified IT training center and consulting firm specializing in Microsoft technologies for SMBs, major companies, and public collectivities to improve productivity | Software Development | 🇫🇷 Villeneuve-d'Ascq | 85 | 1993 | | 30 | [Les-Tilleuls.coop](https://www.tamtam.ai/c/les-tilleuls-coop) (les-tilleuls.coop)
Design and development of innovative web and mobile projects using open-source software, with democratic cooperative governance and profit sharing. | Software Development | 🇫🇷 Lille | 74 | 2011 | ## 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 11, 2026. ## More company lists in the Nord department - [The largest companies in the Nord department](https://www.tamtam.ai/l/largest-companies-nord) (2,806) - [Multinational companies in the Nord department](https://www.tamtam.ai/l/multinational-companies-nord) (332) - [Retail chains in the Nord department](https://www.tamtam.ai/l/retail-chains-nord) (268) - [Companies with in-house R&D in the Nord department](https://www.tamtam.ai/l/r-and-d-companies-nord) (237) - [Manufacturers in the Nord department](https://www.tamtam.ai/l/manufacturers-nord) (204) - [IT services companies in the Nord department](https://www.tamtam.ai/l/it-services-companies-nord) (170) - [IT Services and IT Consulting companies in the Nord department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-nord) (169) - [SaaS companies in the Nord department](https://www.tamtam.ai/l/saas-companies-nord) (163) - [Family-owned companies in the Nord department](https://www.tamtam.ai/l/family-owned-companies-nord) (156) - [Software Development companies in the Nord department](https://www.tamtam.ai/l/software-development-companies-nord) (141) - [Public sector organisations in the Nord department](https://www.tamtam.ai/l/public-sector-organisations-nord) (135) - [Distributors and wholesalers in the Nord department](https://www.tamtam.ai/l/distributors-and-wholesalers-nord) (133) - [Hardware manufacturers in the Nord department](https://www.tamtam.ai/l/hardware-companies-nord) (124) - [Consulting firms in the Nord department](https://www.tamtam.ai/l/consulting-firms-nord) (115) - [Retail companies in the Nord department](https://www.tamtam.ai/l/retail-companies-nord) (108) - [Education providers in the Nord department](https://www.tamtam.ai/l/education-companies-nord) (103) - [Real Estate companies in the Nord department](https://www.tamtam.ai/l/real-estate-companies-nord) (92) - [Critical infrastructure operators in the Nord department](https://www.tamtam.ai/l/critical-infrastructure-operators-nord) (87) - [Companies with a mobile app in the Nord department](https://www.tamtam.ai/l/companies-with-mobile-app-nord) (83) - [Healthcare providers in the Nord department](https://www.tamtam.ai/l/healthcare-providers-nord) (82) - [E-commerce companies in the Nord department](https://www.tamtam.ai/l/ecommerce-companies-nord) (81) - [Financial services firms in the Nord department](https://www.tamtam.ai/l/financial-services-firms-nord) (81) - [Business Consulting and Services companies in the Nord department](https://www.tamtam.ai/l/business-consulting-and-services-companies-nord) (81) - [Advertising Services companies in the Nord department](https://www.tamtam.ai/l/advertising-services-companies-nord) (68) ## The same list elsewhere in France - [Professional services firms in France](https://www.tamtam.ai/l/professional-services-firms-france) (6,611) - [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 Grand Est](https://www.tamtam.ai/l/professional-services-firms-grand-est) (316) - [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) (254) - [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 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) --- Source: https://www.tamtam.ai/l/professional-services-firms-nord