# Top 30 critical infrastructure operators in the Haute-Savoie department

Tamtam tracks 35 critical infrastructure operators headquartered in the Haute-Savoie department. This list ranks the 30 largest by number of employees on LinkedIn, led by Crédit Agricole des Savoie, CH Annecy Genevois and Centre Hospitalier Alpes Léman. Their median headcount is 145. Half of them were founded in 1980 or later. The most common headquarters are Annecy (9) and Annemasse (3).

The critical infrastructure operators in Haute-Savoie are mostly public service providers, with a strong presence of healthcare institutions and government administrations. These are mid-sized to large organizations. Crédit Agricole des Savoie is a regional mutual bank, while CH Annecy Genevois and Centre Hospitalier Alpes Léman are major hospitals. Agglomération du Grand Annecy coordinates economic and social initiatives across 34 communes.

Key sectors include hospitals and health care, represented by institutions like Hôpitaux du Léman, which provides comprehensive care for Chablais residents, and Établissement Public de Santé Mentale 74, specializing in mental health services. Government administration entities such as Service Départemental d'Incendie et de Secours de la Haute-Savoie, which handles emergency responses, are also prominent. A notable pattern is the concentration of healthcare and public service providers across the department.

🇫🇷 Haute-Savoie · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Crédit Agricole des Savoie](https://www.tamtam.ai/c/credit-agricole-des-savoie) (tous-acteurs-des-savoie.coop)<br>Regional mutual bank with 166 agencies and 2200 employees serving 705,000 clients, focused on innovation, customer relationships, and local presence. | Banking | 🇫🇷 Annecy | 1,625 | 1885 |
| 2 | [CH Annecy Genevois](https://www.tamtam.ai/c/ch-annecy-genevois) (ch-annecygenevois.fr)<br>A leading hospital in Haute-Savoie resulting from the merger of Annecy and St Julien-en-Genevois hospitals, with over 4600 dedicated staff providing top-notch care | Hospitals and Health Care | 🇫🇷 Épagny Metz-Tessy | 810 |  |
| 3 | [Centre Hospitalier Alpes Léman](https://www.tamtam.ai/c/centre-hospitalier-alpes-leman) (ch-alpes-leman.fr)<br>A hospital center providing comprehensive care, promoting public hospital values, offering improved patient conditions, ensuring diverse healthcare options, and prioritizing environmental sustainability | Hospitals and Health Care | 🇫🇷 Contamine-sur-Arve | 651 |  |
| 4 | [CENTRE HOSPITALIER ANNECY GENEVOIS](https://www.tamtam.ai/c/centre-hospitalier-annecy-genevois)<br>Hospital offering comprehensive medical services including patient care, diagnostics, treatment, and healthcare support in the Auvergne-Rhône-Alpes region. | Medical Practices | 🇫🇷 Épagny-Metz-Tessy | 649 |  |
| 5 | [Hôpitaux du Léman](https://www.tamtam.ai/c/hopitaux-du-leman) (hopitauxduleman.fr)<br>Provides comprehensive health care services for 130,000 Chablais residents, including hospitalizations, emergency care, medical consultations, and elderly care. | Hospitals and Health Care | 🇫🇷 Thonon-les-Bains | 526 | 1998 |
| 6 | [Établissement Public de Santé Mentale 74](https://www.tamtam.ai/c/etablissement-public-de-sante-mentale-74) (ch-epsm74.org)<br>Provides comprehensive mental health services, including inpatient care, outpatient centers, specialized units for adults and children across several locations. | Hospitals and Health Care | 🇫🇷 La Roche-sur-Foron | 404 | 1975 |
| 7 | [Agglomération du Grand Annecy](https://www.tamtam.ai/c/agglomeration-du-grand-annecy) (grandannecy.fr)<br>Coordination of economic, ecological, mobility, housing, and social initiatives across 34 communes to enhance residents' quality of life. | Government Administration | 🇫🇷 Annecy | 375 | 2017 |
| 8 | [Service Départemental d'Incendie et de Secours de la Haute-Savoie](https://www.tamtam.ai/c/service-departemental-d-incendie-et-de-secours-de-la-haute-savoie) (sdis74.fr)<br>The company is a public firefighting department in Haute-Savoie, France, consisting of professional and volunteer firefighters, as well as administrative and technical staff They respond to various natural, industrial, technological, and everyday risks in the region | Government Administration | 🇫🇷 Annecy | 314 |  |
| 9 | [Hôpitaux du Pays du Mont-Blanc](https://www.tamtam.ai/c/hopitaux-du-pays-du-mont-blanc) (hpmb.fr)<br>Provides comprehensive healthcare services across four sites, including hospitals and nursing homes, with over 1,130 professionals, advanced technical facilities, and medical imaging. | Hospitals and Health Care | 🇫🇷 Sallanches | 306 |  |
| 10 | [Annemasse Agglo](https://www.tamtam.ai/c/annemasse-agglo) (annemasse-agglo.fr)<br>Management of environment, economy, housing, transport, culture, and social services to improve quality of life in a transborder urban area. | Government Administration | 🇫🇷 Annemasse | 290 | 2007 |
| 11 | [CPAM de Haute-Savoie](https://www.tamtam.ai/c/cpam-de-haute-savoie) (ameli.fr)<br>A social security organization in Haute-Savoie, part of a national network, working to protect the health of over 60 million insured individuals through various healthcare projects | Government Administration | 🇫🇷 Annecy | 227 |  |
| 12 | [ATMB - Autoroutes et Tunnel du Mont Blanc](https://www.tamtam.ai/c/atmb-autoroutes-et-tunnel-du-mont-blanc) (atmb.com)<br>Management and operation of mountain highways and the Mont Blanc Tunnel, ensuring safety, mobility, and sustainable transport in the Alps. | Truck Transportation | 🇫🇷 Bonneville | 206 | 1957 |
| 13 | [HOPITAL PRIVE PAYS DE SAVOIE](https://www.tamtam.ai/c/hopital-prive-pays-de-savoie) (hopital-prive-pays-de-savoie-annemasse.ramsaysante.fr)<br>A private hospital near Switzerland and ski resorts, providing quality care in a serene natural setting since 2012 with a team of 400 employees and 130 practitioners | Hospitals and Health Care | 🇫🇷 Annemasse | 206 | 2012 |
| 14 | [Clinique Générale Annecy - Vivalto Santé](https://www.tamtam.ai/c/clinique-generale-annecy-vivalto-sante) (clinique-generale-annecy.vivalto-sante.com)<br>Multidisciplinary healthcare facility providing surgical interventions, maternity care, chemotherapy, emergency services, and daily medical consultations with advanced technical resources. | Hospitals and Health Care | 🇫🇷 Annecy | 192 | 1924 |
| 15 | [HBG Hélicoptères Groupe](https://www.tamtam.ai/c/hbg-helicopteres-groupe) (hbg-helicopteres.aero)<br>Family group global helicopter operations, passenger transport, rescue, air work, pilot training, maintenance, sales, and leasing in Europe, Africa, South America, French Polynesia. | Airlines and Aviation | 🇫🇷 Annemasse | 145 |  |
| 16 | [Syane](https://www.tamtam.ai/c/syane) (syane.fr)<br>Public energy and digital services provider supporting local authorities with electricity, gas, renewable energy, lighting, mobility, and digital infrastructure projects. | Government Administration | 🇫🇷 Poisy | 128 | 1950 |
| 17 | [CLINIQUE D'ARGONAY](https://www.tamtam.ai/c/clinique-d-argonay) (clinique-d-argonay.ramsaysante.fr)<br>A leading surgical facility in Annecy, known for its high patient satisfaction rate (over 95%) due to renovated operating rooms and quality care | Hospitals and Health Care | 🇫🇷 Argonay | 126 | 1976 |
| 18 | [CREDIT MUTUEL SAVOIE-MONT BLANC](https://www.tamtam.ai/c/credit-mutuel-savoie-mont-blanc) (creditmutuel.fr)<br>With 1,000 employees, this company offers a diverse range of banking services to individuals, professionals, and businesses in Haute-Savoie and Savoie | Banking | 🇫🇷 Annecy | 121 | 1990 |
| 19 | [Fondation Alia](https://www.tamtam.ai/c/fondation-alia) (fondationalia.fr)<br>The Foundation Alia prioritizes person-centered care, promoting human values, responsiveness to emerging healthcare needs, and collaboration for quality services in Savoie and Haute-Savoie | Hospitals and Health Care | 🇫🇷 Bonneville | 114 | 1922 |
| 20 | [Clinique des Vallées](https://www.tamtam.ai/c/clinique-des-vallees) (cdv-inicea.fr)<br>The clinic aims to enhance hospitalization by providing exceptional infrastructure and resources in a peaceful and strategic location near Geneva and Annecy | Hospitals and Health Care | 🇫🇷 Ville-la-Grand | 102 |  |
| 21 | [SILA (Syndicat Mixte du Lac d'Annecy)](https://www.tamtam.ai/c/sila-syndicat-mixte-du-lac-d-annecy) (sila.fr)<br>Established in 1957 to protect Lake Annecy, the company specializes in wastewater treatment, waste management, environmental preservation, and water cycle management | Government Administration | 🇫🇷 Annecy | 75 | 1957 |
| 22 | [COMUNIC](https://www.tamtam.ai/c/comunic) (comunic.fr)<br>A consulting and services company in IT, Telephony, Video Surveillance, and Web for professionals, providing comprehensive solutions from conception to maintenance | IT Services and IT Consulting | 🇫🇷 Annecy | 59 | 2004 |
| 23 | [SIBRA (Société Intercommunale des Bus de la Région Annécienne)](https://www.tamtam.ai/c/sibra-societe-intercommunale-des-bus-de-la-region-annecienne) (sibra.fr)<br>Operates and manages urban and interurban bus services across Grand Annecy and Rumilly, promoting sustainable mobility and multimodal connections. | Truck Transportation | 🇫🇷 Annecy | 58 | 1980 |
| 24 | [Hôpital Départemental Dufresne Sommeiller](https://www.tamtam.ai/c/hopital-departemental-dufresne-sommeiller) (hopital-dufresne-sommeiller.fr)<br>L'HDDS is a community hospital offering a wide range of healthcare and social services focused on caring for vulnerable adults losing autonomy | Hospitals and Health Care | 🇫🇷 La Tour | 56 | 1923 |
| 25 | [Centre Hospitalier Gabriel DEPLANTE](https://www.tamtam.ai/c/centre-hospitalier-gabriel-deplante) (ch-rumilly.fr)<br>Hospital located in the heart of Rumilly city, providing healthcare services to the local community | Hospitals and Health Care | 🇫🇷 Rumilly | 45 |  |
| 26 | [O des Aravis](https://www.tamtam.ai/c/o-des-aravis) (odesaravis.com)<br>Specializing in water management in the mountains, this public local company handles water supply, sanitation, and stormwater for communities and clients while promoting health, environment, and local economy | Utilities Administration | 🇫🇷 Saint-Jean-de-Sixt | 44 | 1996 |
| 27 | [Groupe Jean-Claude Mermet](https://www.tamtam.ai/c/groupe-jean-claude-mermet) (mermetjc.com)<br>Specialized freight transport including pallets, hazardous materials, storage, and logistics across France and Europe with environmental focus. | Truck Transportation | 🇫🇷 Marnaz | 40 | 1968 |
| 28 | [HOPITAL ANDREVETAN - Centre de rééducation et d'hébergement](https://www.tamtam.ai/c/hopital-andrevetan-centre-de-reeducation-et-d-hebergement) (ch-andrevetan.fr)<br>The company is a public healthcare facility offering rehabilitation, long-term care for elderly, nursing services at home, and temporary accommodation for the elderly | Hospitals and Health Care | 🇫🇷 La Roche-sur-Foron | 36 | 2017 |
| 29 | [MGEN Evian SSR](https://www.tamtam.ai/c/mgen-evian-ssr) (proximite.mgen.fr)<br>Specialized in post-acute care and rehabilitation, offering a total capacity of 200 beds for both inpatient and day hospitalization services | Hospitals and Health Care | 🇫🇷 Évian-les-Bains | 35 |  |
| 30 | [AUTOCARS PAYS DE SAVOIE](https://www.tamtam.ai/c/autocars-pays-de-savoie) (aps74.fr)<br>The company provides a range of transportation services such as school transport, regular and urban transport, airport transfers, and tours in France and Europe | Truck Transportation | 🇫🇷 La Roche-sur-Foron | 28 | 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 12, 2026.

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- [Real Estate companies in the Haute-Savoie department](https://www.tamtam.ai/l/real-estate-companies-haute-savoie) (32)
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## The same list elsewhere in France

- [Critical infrastructure operators in France](https://www.tamtam.ai/l/critical-infrastructure-operators-france) (2,721)
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## The same list elsewhere

- [Critical infrastructure operators in the world](https://www.tamtam.ai/l/critical-infrastructure-operators-in-the-world) (23,312)
- [Critical infrastructure operators in Europe](https://www.tamtam.ai/l/critical-infrastructure-operators-in-europe) (9,815)

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Source: https://www.tamtam.ai/l/critical-infrastructure-operators-haute-savoie