| # | Company | Employees |
|---|---|---|
| 1 |
EU Careers by EPSOeu-careers.europa.eu
Selection of talented candidates for various EU institutions through competitions, facilitating recruitment of professionals and graduates for European civil service. |
58,380 |
| 2 |
Proximus Groupproximus.com
Provider of connectivity and digital services in Benelux and global markets, investing in networks, digital ecosystems, and innovative communication solutions. |
13,297 |
| 3 |
European Parliamenteuropa.eu
The company is the elected body of the European Union, consisting of members who shape laws and policies, encouraging respectful discussion and participation in European elections |
10,920 |
| 4 | 6,782 | |
| 5 | 6,591 | |
| 6 |
Vlaamse overheidvlaanderen.be
An inclusive employer offering diverse roles in various fields at different locations in Flanders, emphasizing talent and commitment for societal impact |
5,928 |
| 7 |
bpostgroupbpostgroup.com
The company focuses on creating connections through personalized services, constant improvement, challenging projects, collaborations, latest technologies, job opportunities, and training programs |
5,309 |
| 8 |
Infrabelinfrabel.be
A Belgian company maintaining railway infrastructure, coordinating train traffic, and focusing on innovation to develop sustainable and modern mobility solutions |
5,279 |
| 9 |
STIB-MIVBstib-mivb.be
Public urban transport network serving Brussels and surrounding communes with metro, tram, bus, and night bus lines for commuters. |
4,232 |
| 10 | 3,094 | |
| 11 | 2,744 | |
| 12 |
EUROCONTROLeurocontrol.int
The company supports European aviation by delivering technical excellence and expertise in air traffic management, addressing industry challenges and promoting future evolution |
2,639 |
| 13 | 2,600 | |
| 14 |
NATO Communications and Information Agency (NCIA)nato.int
NATO's technology and cyber experts with a team of 3,000 members across Europe and North America, safeguarding networks and providing critical capabilities to preserve peace and security |
2,545 |
| 15 | 2,400 | |
| 16 |
CHU Brugmannchu-brugmann.be
A large hospital in Brussels with 853 beds, 29,000 admissions, and 360,000 outpatient visits annually Known for its social, university, and technical characteristics |
1,943 |
| 17 |
National Bank of Belgiumnbb.be
Ensuring economic stability through price control, financial system security, safe cash, efficient payments, and providing financial data and analysis. |
1,832 |
| 18 |
Fedasilfedasil.be
Public organization coordinating humane reception of asylum seekers, voluntary return programs, and providing material aid and support services for foreigners |
1,675 |
| 19 |
Research Foundation Flanders - FWOfwo.be
This organization in Flanders funds fundamental research, providing fellowships, research projects, and awards to drive innovation and scientific excellence |
1,355 |
| 20 |
FOD Economie / SPF Economie / FPS Economyfgov.be
Working in the Belgian and international economic sector, the organization aims to create competitive and sustainable conditions for the goods and services market |
1,277 |
| 21 |
Actirisactiris.brussels
Provider of tailored solutions for employment in Brussels, offering services for both employers and jobseekers through partnerships with over 150 organizations |
1,139 |
| 22 |
Bruxelles Formationbruxellesformation.brussels
A public service in Brussels offering professional training to job seekers and workers in various fields, forming partnerships with businesses for tailored training programs |
1,043 |
| 23 |
Wallonie-Bruxelles Enseignement (WBE)wbe.be
Public education service managing over 200,000 students from kindergarten to higher education, employing 30,000 staff across 800 sites. |
1,021 |
| 24 |
Sibelgasibelga.be
The company operates as a distribution network operator for electricity and natural gas in the Brussels region, managing distribution networks |
944 |
| 25 |
European Innovation Council and SMEs Executive Agency (EISMEA)eismea.ec.europa.eu
Managing all activities of the European Innovation Council and SME programs, supporting small and medium-sized enterprises in Europe Follow on Twitter for updates |
913 |
| 26 |
De Watergroepdewatergroep.be
The largest water supplier in Flanders, delivering water to 29 million customers in 175 municipalities, and involved in sewage networks and industrial water projects |
853 |
| 27 |
Brussels Environmentenvironnement.brussels
An administration in Brussels managing environment and energy through monitoring, management, permits, education projects, eco-construction, and health-environment links since 1989 |
798 |
| 28 |
Office de la Naissance et de l'Enfanceone.be
Reference organization for child policies, protection, medical-social support, out-of-family care, and parental assistance from perinatal period onward. |
776 |
| 29 |
Kind en Gezinkindengezin.be
Providing preventive family support, childcare services, and adoption assistance to promote the well-being of young children and families. |
696 |
| 30 |
CINEA - European Climate, Infrastructure and Environment Executive Agencycinea.ec.europa.eu
Management of EU programmes supporting climate action, energy, transport, biodiversity, circular economy, and just transition financing initiatives. |
675 |
| 31 |
Belgian Buildings Agency | Regie der Gebouwen | Régie des Bâtimentsregiedesbatiments.be
Management and maintenance of federal office buildings, heritage restoration, technical services, and infrastructure provision for public institutions and cultural sites. |
647 |
| 32 |
Agentschap Integratie en Inburgeringintegratie-inburgering.be
This organization implements Flemish integration and immigration policies, offering services such as integration support, Dutch language courses, integration advice, legal advice, and interpretation services |
638 |
| 33 |
VLAIO - Flanders Innovation & Entrepreneurshipvlaio.be
Support innovation and entrepreneurship through collaboration with partners to enhance business climate, sustainable economic growth, and job creation. |
609 |
| 34 |
EDF EU Affairsedf.fr
A leading electricity company in Europe, focused on sustainable energy, innovation, and environmental responsibility while actively participating in EU policy dialogue |
521 |
| 35 |
Bruxelles-Propreté | Net Brusselarp-gan.be
A regional organization in Brussels overseeing waste collection, treatment, cleaning, and awareness initiatives to promote a healthier city environment |
501 |
| 36 |
Single Resolution Boardsrb.europa.eu
Resolution authority within the European Banking Union, working to ensure orderly resolution of failing banks with minimal impact on economy and public finances |
485 |
| 37 |
Wallonia Export & Investment Agency (AWEX)awex.be
Public agency supporting Walloon companies in export development and enhancing Wallonia's international visibility to attract foreign investments. |
451 |
| 38 |
FIT - Flanders Investment & Tradewelcome.flandersinvestmentandtrade.com
Facilitating international trade and investments, connecting businesses and professionals globally to boost exports and foreign investments for the Flemish economy |
439 |
| 39 |
Service public régional de Bruxellesservicepublic.brussels
Main Brussels government agency implementing regional policies, ensuring quality public services for citizens and businesses with transparency and sustainability. |
422 |
| 40 | 370 | |
| 41 |
European Defence Agencyeda.europa.eu
Facilitates cross-border defence cooperation in Europe, harmonizing requirements, developing capabilities, engaging with industry, and strengthening Europe's defence technological and industrial base |
359 |
| 42 |
NMBS Internationaal - SNCB Internationalb-europe.com
A leading provider of international train tickets in Europe, offering booking services through various channels and partnerships with major railway companies |
355 |
| 43 |
hub.brusselshub.brussels
Support entrepreneurs with personalized advice, promote sustainable economic transformation, facilitate international trade, and foster social and environmental innovation in Brussels. |
342 |
| 44 |
Parlement bruxellois - Brussels Parlementparlement.brussels
The company plays a key role in the political life of Belgium, overseeing the legislative and executive powers of the Brussels-Capital Region |
317 |
| 45 | 311 | |
| 46 |
Instituut van de Bedrijfsrevisoren - Institut des Réviseurs d'Entreprisesibr-ire.be
This organization supports financial experts in their crucial role of creating economic stability and trust through independence, expertise, and integrity |
291 |
| 47 |
Royal Belgian Institute of Natural Sciencesnaturalsciences.be
A Belgian Federal State institution involved in research, public service missions, and operating a museum with over 300,000 annual visitors |
235 |
| 48 |
NIRAS-ONDRAF Belgian Agency for Radioactive Waste and Enriched Fissile Materialsondraf.be
Radioactive waste management agency in Belgium dedicated to developing and implementing solutions with respect for society and the environment |
224 |
| 49 |
Toerisme Vlaanderen - VISITFLANDERStoerismevlaanderen.be
Support sustainable tourism growth in Flanders through professionalization, global promotion, investment, and inclusive holiday access for all visitors. |
218 |
| 50 | 207 | |
| 51 |
i-CITYi-city.brucity.be
Provider of IT solutions & services for the City of Brussels Specializing in digital solutions, managing IT equipment, secure hosting, and central IT procurement services |
186 |
| 52 |
visitbrusselsvisit.brussels
Destination marketing agency promoting Brussels as a cosmopolitan capital for conferences, events, and tourism, showcasing its diverse culture and global connections |
181 |
| 53 |
Bruxelles Mobilité - Brussel Mobiliteitbe.brussels
Public administration responsible for mobility in the Brussels-Capital Region Focus on strategies, infrastructure, road safety, public spaces, public transport, and taxi services for improved urban mobility |
171 |
| 54 |
CIRB_CIBGbe.brussels
Orchestrates digital capabilities and accelerates digital transition for public services in the Brussels-Capital Region, supporting regional digital transformation. |
161 |
| 55 |
NATO C3 Agencyncia.nato.int
The NATO C3 Agency supported NATO through scientific support and common funded acquisition of C4ISR capabilities, serving NATO nations and entities |
152 |
| 56 |
GIALbrucity.be
i-CITY is the outsourced IT department of the City of Brussels, implementing IT strategies, managing hardware and network installations, and offering centralized IT procurement services |
83 |
| 57 |
Art & History Museumartandhistory.museum
A museum in the heart of Brussels housing a wide range of art and historical collections from various time periods and civilizations |
80 |
| 58 |
CERT-EUcert.europa.eu
This company contributes to the security of the ICT infrastructure of EU institutions, offering support in preventing, detecting, and responding to cyber-attacks |
39 |
| 59 |
Gaming Commission - Kansspelcommissie - Commission des jeux de hasardgamingcommission.be
The company is the official regulator of the gambling sector in Belgium, ensuring legal gambling operations and protecting players through licensing and monitoring |
27 |
| 60 |
NATO Science & Technology Organizationnato.int
Delivering innovation, advice, and scientific solutions to meet NATO's security needs, maintaining military and technological edge for current and future challenges |
20 |
| 61 |
Mont-de-Piétémontdepiete.be
A public institution in Brussels offering pawnbroking services for over 400 years, providing access to micro-credit without seeking profit |
14 |
| 62 |
Wallonie-Bruxelles International - Research and Innovationwbi.be
Coordinates research and innovation, connecting institutions and actors, fostering collaboration between foreign and domestic partners through its extensive network. |
3 |
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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 Oct 24, 2026.
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