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ISL Ingénierie

Paris, France

HydroSolarEnergy Storage
Founded 198651-200 employees
Profile last updated: March 13, 2026

About

Founded in 1986, ISL Ingénierie is a renewable energy company headquartered in Paris, France with approximately 51-200 employees specializing in Hydro, Solar, Energy Storage.

ISL Ingénierie is a French engineering consultancy founded in 1986 that provides engineering, consulting and advisory services in water, dams, hydropower, flood protection, coastal and maritime engineering, navigable waterways and environmental projects. Its hydropower work covers hydroelectric plant design and rehabilitation, pumped-storage potential studies and hydro-solar hybridisation. The company is owned by its employees and operates in around forty countries, with offices in France and abroad. It is ISO 9001 and ISO 45001 certified and runs an internal R&D unit.

Headquarters

Paris, France

Founded

1986

Employees

51-200

Focus areas

hydropowerdamsflood protectioncoastal engineeringwater resourceshydro-solar hybridisationpumped storageengineering consultancyemployee-owned

Products & services

Business models

B2B

Value chain

EngineeringConsultingAdvisoryR&D

Service areas (1)

  • Hydroélectricité & énergies nouvelles

    Hydropower engineering studies, hydro-solar hybridisation and pumped-storage potential assessments.

Locations

Headquarters

Boulevard Mac Donald 75, 75019, Paris, France

Operating locations (9)

  • Rue de la Belle Jardinière 256, Liège, Belgium
  • Rue du 14 Juillet 69, Pau, France
  • Rue de Verdun 15 bis, Nouméa, New Caledonia
  • Centre Galaxie, Tour C, Rue de l'Arabie Saoudite, Tunis, Tunisia
  • Rue des frères Oughlis 25, Alger, Algeria
  • Avenue Giscard d'Estaing, Yaoundé, Cameroon
  • Rue des Jardins, Abidjan, Côte d'Ivoire
  • C/ Joan Güell 98, Piso 6, Puerta 1, Barcelona, Spain
  • Rue Saint Rémi 03, Lomé, Togo

Projects

6

Centrale hydroélectrique de Nachtigal

Hydroelectric power plant

Detailed execution studies for the Nachtigal hydroelectric plant, including the dam and environmental-flow plant.

Centrale hydroélectrique de Paalo

Hydroelectric power plant

Design and construction supervision for the Paalo hydroelectric plant.

Centrale hydroélectrique de Nangbeto

Hydroelectric power plant

Supervision of rehabilitation works at the Nangbeto hydroelectric plant.

PV flottants sur le barrage de Badaillac

Floating solar PV

Technical studies for installing floating photovoltaic panels on the Badaillac dam.

Étude de potentiel STEP de Saint-Pierre

Pumped storage hydropower

Detailed studies of a pumped-storage hydropower station at Saint-Pierre, Martinique.

Saint-Pierre, France

Hybridation hydro-solaire de barrages en Afrique de l'Ouest

Hydro-solar hybrid

Technical and financial study of hydro-solar hybridisation on existing dams in West Africa.

Credentials & affiliations

Certifications

ISO 9001

ISO 45001

Awards

Prix de l'innovation pour le projet DigueELITE

Comité International des Grands Barrages2018

Industry memberships

Comité Français des Barrages et Réservoirs (CFBR)Pôle Mer Bretagne Atlantique

Partnerships

INRAE, CEREMA, École des Ponts ParisTech, Grenoble INP, Andra, Voies Navigables de France (VNF), Polder2Cs project partners

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