# Top 30 public sector organisations in the Seine-et-Marne department

Tamtam tracks 49 public sector organisations headquartered in the Seine-et-Marne department. This list ranks the 30 largest by number of employees on LinkedIn, led by Université Gustave Eiffel, Département de Seine et Marne and UGAP. Their median headcount is 144. Half of them were founded in 1990 or later. The most common headquarters are Champs-sur-Marne (6), Melun (4) and Lieusaint (2).

This list comprises public sector organizations in Seine-et-Marne, predominantly large entities in government administration, higher education, and healthcare. Notable organizations include Université Gustave Eiffel, which combines research and various educational institutions, and the Département de Seine et Marne, providing diverse public services. UGAP acts as the sole general public procurement center in France, while École nationale des ponts et chaussées offers multidisciplinary engineering training. Grand Hôpital de l'Est Francilien delivers medical and psychiatric care, and SDIS 77 focuses on fire prevention and emergency response.

A significant concentration of these public sector bodies, particularly in higher education and government administration, are headquartered in Champs-sur-Marne. This suggests a hub for public service and academic institutions within the department. The founding dates range widely, from the École nationale des ponts et chaussées established in 1747 to ONF Vegetis founded in 2022, indicating a long history of public service alongside more recent initiatives.

🇫🇷 Seine-et-Marne · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Université Gustave Eiffel](https://www.tamtam.ai/c/universite-gustave-eiffel) (univ-gustave-eiffel.fr)<br>Combines research, university, architecture school, and engineering schools to provide diverse education and scientific insights for all levels. | Higher Education | 🇫🇷 Champs-sur-Marne | 2,225 | 2020 |
| 2 | [Département de Seine et Marne](https://www.tamtam.ai/c/departement-de-seine-et-marne) (seine-et-marne.fr)<br>Provides diverse public services, including social action, territorial development, culture, youth, and education, to residents, focusing on quality and employee well-being. | Government Administration | 🇫🇷 Melun | 1,531 |  |
| 3 | [UGAP](https://www.tamtam.ai/c/ugap) (ugap.fr)<br>A French public commercial entity founded in 1985, serving various sectors by acting as the sole general public procurement center in France | Government Administration | 🇫🇷 Champs-sur-Marne | 1,363 |  |
| 4 | [École nationale des ponts et chaussées](https://www.tamtam.ai/c/ecole-nationale-des-ponts-et-chaussees) (ecoledesponts.fr)<br>Engineering school providing multidisciplinary training and advanced research in engineering, economics, and digital and ecological transitions. | Higher Education | 🇫🇷 Champs-sur-Marne | 1,126 | 1747 |
| 5 | [Grand Hôpital de l'Est Francilien](https://www.tamtam.ai/c/grand-hopital-de-l-est-francilien) (ghef.fr)<br>Integrated hospital network providing extensive medical and psychiatric care across multiple sites, serving the northern Seine-et-Marne population. | Government Administration | 🇫🇷 Meaux | 904 | 2017 |
| 6 | [SDIS 77 - Sapeurs-pompiers de Seine-et-Marne](https://www.tamtam.ai/c/sdis-77-sapeurs-pompiers-de-seine-et-marne) (sdis77.fr)<br>A public establishment in Seine-et-Marne focused on preventing, protecting, and fighting fires, as well as providing emergency response in the region | Public Safety | 🇫🇷 Melun | 862 | 1934 |
| 7 | [Université Paris-Est Marne-la-Vallée](https://www.tamtam.ai/c/universite-paris-est-marne-la-vallee) (univ-gustave-eiffel.fr)<br>Public university focused on innovation, research, and education, collaborating closely with economic sectors and practicing unique governance models. | Research Services | 🇫🇷 Champs-sur-Marne | 519 | 1991 |
| 8 | [Centre hospitalier du Sud Seine-et-Marne](https://www.tamtam.ai/c/centre-hospitalier-du-sud-seine-et-marne) (ch-sud-seine-et-marne.fr)<br>Groups hospitals in Fontainebleau, Montereau-Fault-Yonne, and Nemours, resulting from a shared medical project to provide healthcare services in the region. | Hospitals and Health Care | 🇫🇷 Fontainebleau | 332 | 2017 |
| 9 | [EOGN - École des officiers de la gendarmerie nationale](https://www.tamtam.ai/c/eogn-ecole-des-officiers-de-la-gendarmerie-nationale) (gendarmerie.interieur.gouv.fr)<br>Academy trains officers for the French Gendarmerie Nationale since 1918, offering modern pedagogical methods, high-level instruction, and professional expertise for future leaders. | Higher Education | 🇫🇷 Melun | 270 | 1918 |
| 10 | [Groupe Hospitalier Sud Ile-de-France](https://www.tamtam.ai/c/groupe-hospitalier-sud-ile-de-france) (ghsif.fr)<br>Leading public healthcare group in Southern Seine-et-Marne, France, comprised of hospitals, health facilities, and a shared direction with a gerontology establishment | Medical Practices | 🇫🇷 Melun | 259 |  |
| 11 | [IUT Sénart Fontainebleau](https://www.tamtam.ai/c/iut-senart-fontainebleau) (iutsf.u-pec.fr)<br>The company in Seine-et-Marne offers a wide range of educational programs, from Bachelors to Masters, in various fields with modern facilities for optimal learning conditions | Higher Education | 🇫🇷 Lieusaint | 170 | 1998 |
| 12 | [SIAM](https://www.tamtam.ai/c/siam) (siam77.fr)<br>The Intercommunal Sanitation Syndicate of Marne-la-Vallée collects, transports, and treats wastewater, focusing on energy production and circular economy initiatives for environmental transition | Government Relations Services | 🇫🇷 Saint-Thibault-des-Vignes | 163 | 1974 |
| 13 | [Paris - Vallée de la Marne](https://www.tamtam.ai/c/paris-vallee-de-la-marne) (agglo-pvm.fr)<br>A dynamic community in Seine-et-Marne, focusing on balanced, sustainable development in the East Parisian and Greater Paris area for residents and businesses | Government Administration | 🇫🇷 Torcy | 154 | 2016 |
| 14 | [ONF Vegetis](https://www.tamtam.ai/c/onf-vegetis) (onf-vegetis.fr)<br>Expertise in managing and preserving urban and natural tree heritage, enhancing green spaces, and promoting sustainable environmental practices. | Landscaping Services | 🇫🇷 Nemours | 151 | 2022 |
| 15 | [EpaMarne EpaFrance](https://www.tamtam.ai/c/epamarne-epafrance) (epamarne-epafrance.fr)<br>specialized in urban development and wood construction, focusing on sustainable city planning across multiple communes in eastern Paris region | Architecture and Planning | 🇫🇷 Champs-sur-Marne | 144 | 1972 |
| 16 | [CCI Seine-et-Marne](https://www.tamtam.ai/c/cci-seine-et-marne) (seineetmarne.cci.fr)<br>Support businesses of all sizes and sectors through development stages, represent interests, collaborate with government, and promote regional economic growth. | Government Administration | 🇫🇷 Serris | 143 |  |
| 17 | [Communauté d'Agglomération Melun Val de Seine](https://www.tamtam.ai/c/communaute-d-agglomeration-melun-val-de-seine) (melunvaldeseine.fr)<br>Regional urban community managing 20 communes, focusing on sustainable development, economic growth, cultural vitality, and ecological transition. | Government Administration | 🇫🇷 Dammarie-lès-Lys | 140 | 2002 |
| 18 | [Mairie de Villeparisis](https://www.tamtam.ai/c/mairie-de-villeparisis) (villeparisis.fr)<br>This company is the official account of the municipality of Villeparisis, a community in Roissy Pays de France, Seine-et-Marne They provide information about the city and its proximity to notable locations | Government Administration | 🇫🇷 Villeparisis | 134 |  |
| 19 | [Communauté d'Agglomération de Marne et Gondoire](https://www.tamtam.ai/c/communaute-d-agglomeration-de-marne-et-gondoire) (marneetgondoire.fr)<br>Management and development of a regional community comprising 20 municipalities, focusing on local governance, population growth, and regional services. | Government Administration | 🇫🇷 Bussy-Saint-Martin | 132 | 2001 |
| 20 | [Mairie de Bussy-Saint-Georges](https://www.tamtam.ai/c/mairie-de-bussy-saint-georges) (bussysaintgeorges.fr)<br>The company is located in Bussy-Saint-Georges, Seine-et-Marne, a growing city with a significant population increase and attractive amenities for residents and businesses | Government Administration | 🇫🇷 Bussy-Saint-Georges | 129 |  |
| 21 | [Ville de Dammarie-lès-Lys](https://www.tamtam.ai/c/ville-de-dammarie-les-lys) (mairie-dammarie-les-lys.fr)<br>Local government managing urban development, green spaces, cultural and sports facilities, supporting community activities, and promoting responsible, dynamic city life. | Government Administration | 🇫🇷 Dammarie-lès-Lys | 123 |  |
| 22 | [Ville de Lagny-sur-Marne](https://www.tamtam.ai/c/ville-de-lagny-sur-marne) (lagny-sur-marne.fr)<br>City with rich heritage, local tourism attractions, over 21,000 residents, quality environment, river Marne, and abundant green spaces. | Government Administration | 🇫🇷 Lagny-sur-Marne | 114 |  |
| 23 | [La Ferme du Buisson](https://www.tamtam.ai/c/la-ferme-du-buisson) (lafermedubuisson.com)<br>A unique cultural venue in Marne-la-Vallée, offering outdoor spaces, theaters, a cinema, and a contemporary art center, promoting diverse contemporary creations | Entertainment Providers | 🇫🇷 Noisiel | 95 | 1990 |
| 24 | [Ville de Lieusaint](https://www.tamtam.ai/c/ville-de-lieusaint) (ville-lieusaint.fr)<br>Manages public infrastructure, schools, and cultural centers while developing green spaces, ecological neighborhoods, and transport links for thirteen thousand residents in Seine-et-Marne. | Government Administration | 🇫🇷 Lieusaint | 92 |  |
| 25 | [Epms Fondation Hardy](https://www.tamtam.ai/c/epms-fondation-hardy) (epms-hardy.com)<br>EPMS supports individuals with disabilities in defining and implementing personal projects, focusing on individual needs and abilities through tailored care and support | Government Administration | 🇫🇷 Marles-en-Brie | 91 | 1905 |
| 26 | [Ville de Roissy-en-Brie](https://www.tamtam.ai/c/ville-de-roissy-en-brie) (roissyenbrie77.fr)<br>A dynamic city in the heart of Seine-et-Marne, Roissy-en-Brie offers a prime living environment near Paris, with a focus on economic growth and community services Apply for opportunities | Government Administration | 🇫🇷 Roissy-en-Brie | 85 |  |
| 27 | [Lycée Pierre de Coubertin, Meaux(77100)](https://www.tamtam.ai/c/lycee-pierre-de-coubertin-meaux-77100) (lyceecoubertin-meaux.fr)<br>A diverse high school offering a range of academic and vocational programs for students to prepare them for various paths | Education Administration Programs | 🇫🇷 Meaux | 76 |  |
| 28 | [Ville de Vaux-le-Pénil](https://www.tamtam.ai/c/ville-de-vaux-le-penil) (mairie-vaux-le-penil.fr)<br>A community with 11,039 residents, 280 employees, 18 municipal facilities, over 175 associations, and rich cultural, historical, and natural assets | Government Administration | 🇫🇷 Vaux-le-Pénil | 69 | 1256 |
| 29 | [CH Léon Binet - Provins](https://www.tamtam.ai/c/ch-leon-binet-provins)<br>Diagnostic, treatment, prevention, and health education services, operating a hospital with 399 beds and 60 places, employing 900 professionals. | Hospitals and Health Care | 🇫🇷 Provins | 67 | 1974 |
| 30 | [Ecole nationale des Sciences géographiques](https://www.tamtam.ai/c/ecole-nationale-des-sciences-geographiques) (geodata-paris.fr)<br>ENSG is a public engineering school specializing in Geomatics, located in Champs-sur-Marne It is affiliated with IGN and Gustave Eiffel University | Higher Education | 🇫🇷 Champs-sur-Marne | 64 | 1941 |

## 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 the Seine-et-Marne department

- [The largest companies in the Seine-et-Marne department](https://www.tamtam.ai/l/largest-companies-seine-et-marne) (947)
- [Multinational companies in the Seine-et-Marne department](https://www.tamtam.ai/l/multinational-companies-seine-et-marne) (139)
- [Companies with in-house R&D in the Seine-et-Marne department](https://www.tamtam.ai/l/r-and-d-companies-seine-et-marne) (104)
- [Manufacturers in the Seine-et-Marne department](https://www.tamtam.ai/l/manufacturers-seine-et-marne) (100)
- [Hardware manufacturers in the Seine-et-Marne department](https://www.tamtam.ai/l/hardware-companies-seine-et-marne) (84)
- [Distributors and wholesalers in the Seine-et-Marne department](https://www.tamtam.ai/l/distributors-and-wholesalers-seine-et-marne) (82)
- [Retail chains in the Seine-et-Marne department](https://www.tamtam.ai/l/retail-chains-seine-et-marne) (68)
- [Construction companies in the Seine-et-Marne department](https://www.tamtam.ai/l/construction-companies-seine-et-marne) (57)
- [Family-owned companies in the Seine-et-Marne department](https://www.tamtam.ai/l/family-owned-companies-seine-et-marne) (49)
- [Professional services firms in the Seine-et-Marne department](https://www.tamtam.ai/l/professional-services-firms-seine-et-marne) (41)
- [Government Administration companies in the Seine-et-Marne department](https://www.tamtam.ai/l/government-administration-companies-seine-et-marne) (39)
- [Industrial Machinery Manufacturing companies in the Seine-et-Marne department](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-seine-et-marne) (34)
- [Wholesale companies in the Seine-et-Marne department](https://www.tamtam.ai/l/wholesale-companies-seine-et-marne) (34)
- [Critical infrastructure operators in the Seine-et-Marne department](https://www.tamtam.ai/l/critical-infrastructure-operators-seine-et-marne) (33)
- [Retail companies in the Seine-et-Marne department](https://www.tamtam.ai/l/retail-companies-seine-et-marne) (33)
- [Education providers in the Seine-et-Marne department](https://www.tamtam.ai/l/education-companies-seine-et-marne) (31)
- [IT Services and IT Consulting companies in the Seine-et-Marne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-seine-et-marne) (31)
- [IT services companies in the Seine-et-Marne department](https://www.tamtam.ai/l/it-services-companies-seine-et-marne) (29)
- [Contract manufacturers in the Seine-et-Marne department](https://www.tamtam.ai/l/contract-manufacturers-seine-et-marne) (26)
- [Healthcare providers in the Seine-et-Marne department](https://www.tamtam.ai/l/healthcare-providers-seine-et-marne) (26)
- [Higher Education companies in the Seine-et-Marne department](https://www.tamtam.ai/l/higher-education-companies-seine-et-marne) (25)

## The same list elsewhere in France

- [Public sector organisations in France](https://www.tamtam.ai/l/public-sector-organisations-france) (4,006)
- [Public sector organisations in Île-de-France](https://www.tamtam.ai/l/public-sector-organisations-ile-de-france) (993)
- [Public sector organisations in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/public-sector-organisations-auvergne-rhone-alpes) (451)
- [Public sector organisations in Grand Est](https://www.tamtam.ai/l/public-sector-organisations-grand-est) (427)
- [Public sector organisations in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/public-sector-organisations-provence-alpes-cote-dazur) (384)
- [Public sector organisations in Occitanie](https://www.tamtam.ai/l/public-sector-organisations-occitanie) (317)
- [Public sector organisations in Nouvelle-Aquitaine](https://www.tamtam.ai/l/public-sector-organisations-nouvelle-aquitaine) (310)
- [Public sector organisations in Hauts-de-France](https://www.tamtam.ai/l/public-sector-organisations-hauts-de-france) (261)
- [Public sector organisations in Pays de la Loire](https://www.tamtam.ai/l/public-sector-organisations-pays-de-la-loire) (185)
- [Public sector organisations in the Bouches-du-Rhône department](https://www.tamtam.ai/l/public-sector-organisations-bouches-du-rhone) (183)
- [Public sector organisations in Normandy](https://www.tamtam.ai/l/public-sector-organisations-normandy) (166)
- [Public sector organisations in Brittany](https://www.tamtam.ai/l/public-sector-organisations-brittany) (165)
- [Public sector organisations in the Nord department](https://www.tamtam.ai/l/public-sector-organisations-nord) (135)
- [Public sector organisations in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/public-sector-organisations-bourgogne-franche-comte) (130)
- [Public sector organisations in Centre-Val de Loire](https://www.tamtam.ai/l/public-sector-organisations-centre-val-de-loire) (121)
- [Public sector organisations in the Rhône department](https://www.tamtam.ai/l/public-sector-organisations-rhone) (120)
- [Public sector organisations in the Haute-Garonne department](https://www.tamtam.ai/l/public-sector-organisations-haute-garonne) (111)
- [Public sector organisations in the Gironde department](https://www.tamtam.ai/l/public-sector-organisations-gironde) (109)
- [Public sector organisations in the Hauts-de-Seine department](https://www.tamtam.ai/l/public-sector-organisations-hauts-de-seine) (96)
- [Public sector organisations in the Seine-Saint-Denis department](https://www.tamtam.ai/l/public-sector-organisations-seine-saint-denis) (91)
- [Public sector organisations in the Isère department](https://www.tamtam.ai/l/public-sector-organisations-isere) (80)
- [Public sector organisations in Paris](https://www.tamtam.ai/l/public-sector-organisations-paris) (460)
- [Public sector organisations in Marseille](https://www.tamtam.ai/l/public-sector-organisations-marseille) (103)
- [Public sector organisations in Toulouse](https://www.tamtam.ai/l/public-sector-organisations-toulouse) (83)

## The same list elsewhere

- [Public sector organisations in the world](https://www.tamtam.ai/l/public-sector-organisations-in-the-world) (18,493)
- [Public sector organisations in Europe](https://www.tamtam.ai/l/public-sector-organisations-in-europe) (8,568)

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Source: https://www.tamtam.ai/l/public-sector-organisations-seine-et-marne