A leader in Switzerland


A leading service provider

HYDRO Exploitation SA is a leading service provider, based in Sion (Valais). Our core business is the operation and maintenance of hydro power plants. We combine all the required skills for our area of activity under one roof, from maintenance staff to the engineering. Our 400 employees are active in the region from the eastern part of the Alps in the canton of Valais to the Jura hills in the canton of Vaud.

Thanks to our unique expertise, we offer high value-added services that meet the different needs of our customers and are satisfying their high quality standards.

We offer our portfolio of services to electricity producers, public authorities, transport providers and the industry.

We are mainly active in Switzerland and occasionally operate in other countries.

Facilities operated

A wide range of complex facilities

We operate a fleet of plants consisting of more than 40 hydroelectric power plants with an installed capacity of approximately 22% of all Swiss hydro electrical capacity (25% with pumping). Together, these facilities produce approximately 16% of Switzerland’s hydroelectric power.

We maintain and operate a wide range of different types of hydro electrical power plants. They differ in size, capacity, yearly energy production and in the technology. Operation and maintenance of such facilities requires specific skills.

Map of facilities


Varied, cutting-edge skills

Our services take account of the life cycles of the facilities and their components. Based on the specific requirements of our customers, our engineers and specialists assess the fitness for service of a facility and carry out refurbishment or replacement projects.

In our own mechanical workshops, using the proven know-how of our staff, we refurbish and upgrade hydraulic components such as runners for turbines and pumps, valves, shutters and we offer as well the mechanical production of spare parts.

We also offer specific services in the fields of civil engineering, electrical equipment and automation & control.

Executive Board

Elmar Kämpfen Director
Alexandre Bircher Technical Services & Sales
Arnaud Schaller Administration & Finance
Yvan Michellod Operations & Maintenance


Bord of directors

Amédée Murisier President
Representing Alpiq Suisse SA
Stéphane Maret Vice President
Representing FMV SA
Nicolas Rouge Member
Representing / Grande Dixence SA
François Emery Member
Representing Alpiq Suisse SA
Paul Michellod Member
Representing Grande Dixence SA
Philippe Durr Member
Representing Romande Energie Holding SA
Raoul Albrecht Member
Representing FMV SA
Martin Eschle Member
Representing Grande Dixence SA

Participation in the share capital of HYDRO Exploitation SA

Download the annual report


Respect, transparency and management

We have introduced an integrated management system for quality, environment, health and safety: We have the following certifications and accreditations:

  • ISO 9001 (Quality management system)
  • ISO 14001 (Environmental management system)
  • ISO 45001 (Occupational health and safety management system)
  • ISO 3834-2 (Welding quality requirements)
  • ONR 49001 / ISO 31000 (Risk management)
  • ISO/CEI 17025 (General requirements for the competence of testing and calibration laboratories)
  • Valais Excellence
  • Apprenticeships programs

values built together

HYDRO Exploitation is a responsible company, concerned with the well-being of its employees that strives to create a working environment in which everyone feels recognized, fulfilled and engaged.

To contribute to this, values have been defined collectively, through an internal participatory process. They inspire our behavior, in the service of our customers and our mission, as well as in our teams.

Our history

Reorganisation by business lines

The announced opening of the electricity market gave birth to HYDRO Exploitation SA in 2002. The founding shareholders wanted to rethink their traditional operating structures.

Activities were reorganised by business lines: generation, transmission, distribution, trading and sales. The aim of this regrouping was to create strong pools of expertise and to optimise the overall management. A cornerstone for its founders of this reorganisation was the taking over of all hydroelectric facility operation activities by a new specialised company, HYDRO Exploitation SA.

In addition to strengthening local skills, this centralisation of activities has made it possible to optimise maintenance costs, while ensuring and improving the safety, flexibility and availability of the facilities.

In 2011, we took an important step forward by grouping our workshops in the area of Les Vorziers in Martigny. The modernity of our equipment, the variety of skills and the complementary nature of the services offered on a single site represent a definite added value for our customers.

About 400 highly qualified employees apply the expertise in the range of areas in which we operate. Nearly 300 people are employed at generating facilities or in our central workshops in Martigny. In addition, we have a high-performance engineering centre, with 80 engineers working in multidisciplinary fields.

Hydro Exploitation SA
Rue de l'industrie 10
CP 315 - CH-1951 Sion