IDEX logo

IDEX

Developing and operating vertically integrated local low-carbon energy infrastructures and distribution networks.

Founded in 1963, this French group specializes in the design, financing, and operation of carbon-free energy infrastructures. The company manages the entire value chain from thermal and electrical production to final distribution through district heating and cooling networks. Utilizing local resources such as biomass, geothermal, and solar power, it serves residents, cities, and industrial clients alike. Having recently transitioned to a mission-driven status, the organization emphasizes its commitment to creating a positive environmental impact. Its large-scale operations across residential and tertiary sectors position it as a critical player in localized energy transitions.

Open positions at IDEX

1 active listing

Chargé de missions Engagement & RSE

Internship Entry-level
France Jul 27, 2026

Frequently Asked Questions about IDEX

What are the main sustainability and ESG challenges for IDEX?

One of the most significant challenges for IDEX might be the operational complexity of managing a diverse portfolio of decentralized energy assets while maintaining high carbon efficiency across the entire value chain. As a mission-driven company, IDEX likely faces intense pressure to demonstrate tangible social and environmental returns to stakeholders, requiring sophisticated ESG reporting and data transparency. Furthermore, balancing the fluctuating costs of diverse renewable fuel sources like biomass and waste with the need for affordable energy delivery could be a central ESG tension. The company might also need to navigate evolving European regulations on heat network decarbonization and circular economy standards, ensuring all new infrastructure projects align with increasingly stringent biodiversity and emissions requirements.

Why consider joining IDEX's sustainability team?

Joining the sustainability team at IDEX could offer an exceptional opportunity to work at the intersection of technical infrastructure and social purpose given its mission-driven status. You might have the chance to directly influence the decarbonization pathways of entire cities and industrial clusters, making a visible impact on local energy independence. Because the company is vertically integrated, employees in sustainability likely enjoy a holistic view of the energy transition, from raw resource sourcing to final consumption efficiency. This environment could be ideal for those looking to apply ESG principles to large-scale, tangible physical assets rather than purely theoretical frameworks.

What could be interesting sustainability jobs at IDEX?

Potential sustainability roles at IDEX could include Energy Transition Analysts, who might evaluate the feasibility of converting existing heating networks to 100% renewable sources. Given the vertically integrated nature of the business, Carbon Lifecycle Specialists could be vital for measuring the net impact of waste-to-energy and biomass supply chains. Other roles might include Social Impact Managers focused on energy poverty and community engagement, as well as ESG Compliance Leads who would oversee the integration of the Group's mission-driven objectives into its daily operational governance and financial reporting.

How to stand out as a candidate for IDEX's sustainability team?

To stand out as a candidate for the IDEX sustainability team, you might benefit from demonstrating a deep understanding of the French regulatory landscape for energy, such as the RE2020 or specific region-specific heat network subsidies. Showing that you possess a blend of technical engineering knowledge and strategic ESG reporting skills could be highly advantageous, as the company operates at a high level of technical complexity. Highlighting experience in stakeholder management, particularly with local government bodies and industrial partners, might also set you apart. Given their mission-driven identity, expressing a clear personal alignment with long-term ecological transition and an ability to translate corporate mission statements into measurable operational KPIs could be key during the selection process.

What could you learn from a career in sustainability at IDEX?

A career at IDEX could provide profound insights into the technical and financial hurdles of substituting fossil fuels with local renewable alternatives on a territorial scale. You would likely learn how to manage complex multi-year infrastructure projects where sustainability and economic viability must be harmonized through innovative financing and engineering. Additionally, working within a mission-driven company might help you master new forms of corporate governance and impact measurement that go beyond traditional financial metrics. You would likely gain exposure to a wide variety of green technologies, including geothermal energy and solar power, while developing a specialized understanding of the circular economy in the energy sector.

CSR Jobs newsletter

Never miss the next opportunity

Get a curated selection of new CSR, ESG, and sustainability roles in your inbox. No daily noise, just useful opportunities.

Free to join. Unsubscribe anytime.