Energy technology in
Lausanne

CIEL Electricité SA

Since 1947 · 51–100 empl.·4.2(69)

CIEL Electricité SA provides electrical engineering and installation services for businesses and private customers. Its work includes planning, installing and maintaining electrical systems, photovoltaic systems, EV charging stations, building automation, and computer and telephone networks.

Gaznat SA Société pour l'Approvisionnement et le Transport du Gaz naturel et renouvelable en Suisse Occidentale

Since 1968 · 21–50 empl.

Gaznat SA Société pour l'Approvisionnement et le Transport du Gaz naturel et renouvelable en Suisse Occidentale secures gas supply through the procurement and transport of natural and renewable gas. It operates and maintains a high-pressure pipeline network and develops solutions to integrate renewable gases.

Hydro Operation International SA

Since 2014 · 11–20 empl.

The company's core activity is the transformation of hydroelectric energy in Africa by providing services in the areas of: Operation and Maintenance (E&M) of hydroelectric plants, Project Management, Asset Management, Rehabilitation of power plants, Specialized Engineering Services, and Training and Knowledge Transfer. The company focuses on long-term maintenance and operation of hydroelectric plants in Africa to ensure a reliable and sustainable energy supply.

SoHHytec SA

Since 2020 · 11–20 empl.

SoHHytec SA develops and manufactures systems that use solar energy and water to produce hydrogen, oxygen, electricity and heat. The company designs, installs, operates and maintains installations based on its photoelectrochemical Arb technology.

Eiffage Energie Systèmes Multitechniques SA

Since 2017 · 1–10 empl.

The company provides services in the field of technical building equipment and facility management. The core activities include planning, installation, maintenance and servicing of heating, sanitary, ventilation, air conditioning and cooling systems as well as water and gas pipeline networks. In addition, the company offers energy solutions, including energy contracting, and facility management services to extend the lifespan of installations and improve energy efficiency.

Amaudruz Énergies SA

Since 2013 · 1–10 empl.·4.1(9)

Amaudruz Énergies SA is the origin of the energy division of Amaudruz SA, which was integrated into the electrical installation company. The division plans and delivers photovoltaic systems, solar contracting, smart distribution networks and collective self-consumption schemes, as well as energy management, battery storage and charging infrastructure for electric mobility.

H2REMA Sàrl

Since 2024 · 1–10 empl.

H2REMA Sàrl develops AEM electrolyzers for producing green hydrogen. Its products include a stand-alone 2.5 kW system for small-scale applications and a 50 kW electrolyzer intended for industrial uses and refuelling stations.

Windworks SA

Since 2025 · 1–10 empl.

Windworks SA develops compact vertical-axis wind turbines for on-site electricity generation by businesses, farms and communities. Its technology adjusts blade orientation in real time, and the company also offers its control framework for wind turbines.

ELECTROFUELED Sàrl

Since 2026 · 1–10 empl.

ELECTROFUELED Sàrl is developing an integrated process to produce synthetic fuels from industrial CO₂ and water using renewable electricity. Its technology converts these inputs into syngas for further processing into e-SAF, e-diesel and e-gasoline.

Centrale thermique 23, chemin des Bossons Lausanne SA

Since 1967 · 1–10 empl.

Bernard Bezençon, SGI

Since 1992 · 1–10 empl.

INFINE Industrie Finance Energie Sàrl

Since 2003 · 1–10 empl.