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Chargé de missions bas carbone principal

Groupe Léon Grosse • France • Added on Sep 4, 2026
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As the Lead Low Carbon Project Manager, you will oversee the structural decarbonization of one of France’s leading construction players. Reporting directly to the Environmental Director, you will manage a specialized team, coordinate a network of regional environmental referents, and define the technical roadmaps for sustainable building practices. This involves moving beyond high-level strategy to ensure that Life Cycle Assessments and low-carbon tools are effectively deployed across diverse construction sites.

This role is critical because the construction sector represents a major portion of global emissions, and Groupe Léon Grosse has set ambitious 2030 targets. You will be the technical architect behind their transition, influencing how stadiums, infrastructure, and residential projects are built. By bridging the gap between corporate CSR goals and operational execution, you directly contribute to reducing the embodied carbon of the French built environment.

This suits someone who combines deep technical expertise in building ACVs and RE2020 regulations with the leadership experience needed to mentor a team and influence senior governance. You should be a pedagogical leader who thrives on turning complex environmental data into actionable field strategies.

Job-FAQs

What are the main missions and responsibilities of this role?

You will be responsible for defining and steering the low-carbon strategy of the entire Group, ensuring that the 2030 CSR roadmap is translated into operational reality. This involves managing the carbon pole's workload, overseeing the quality of technical deliverables, and representing the department in high-level internal governance meetings. Beyond strategy, you will supervise the creation and maintenance of decarbonization tools and training programs for agency referents. You will act as a technical lighthouse, consolidating feedback from the field to continuously refine the company’s environmental expertise and ensuring compliance with evolving French regulations.

Key learning opportunities for this job

In this position, you will gain unparalleled exposure to large-scale sustainable construction projects, ranging from stadiums to infrastructure. You will deepen your mastery of RE2020, Life Cycle Assessments (LCA), and circular economy principles applied to the building sector at a corporate scale. Additionally, the role offers significant development in environmental leadership and change management. You will learn how to align complex regulatory requirements with the commercial and operational constraints of a major construction group, while refining your ability to manage a team of specialized environmental experts.

How does the ideal candidate look like (experience, skills)?

The ideal candidate holds a Master's degree in Environment or Civil Engineering with 5 to 8 years of experience specifically within the BTP/Construction sector. Deep technical knowledge of carbon calculations, building certifications, and biodiversity is essential for credibility with engineering teams. We are looking for a profile that balances conviction and pragmatism. You must be able to demonstrate previous experience in management and show a high level of diplomacy to navigate the hierarchical and operational landscape of a large industrial group.

Advice to stand out and make a successful application

Focus your application on concrete examples where you successfully integrated low-carbon constraints into a project's financial or technical reality. The recruiters are looking for someone who understands 'terrain' (field) realities, so highlight your ability to speak the language of site managers and engineers. Given the Group's emphasis on their 'simple, loyal, and authentic' culture, your cover letter should reflect your entrepreneurial spirit and your ability to be a 'force for proposal.' Mentioning specific Léon Grosse projects and how you would have approached their carbon footprint could demonstrate high motivation.

What aspects of the company's sustainability is this role likely to focus on?

The core of this role is the decarbonization of building assets. This includes managing Life Cycle Assessments, promoting the use of bio-sourced materials, and integrating circular economy practices like material reuse into standard construction workflows. Secondary focuses include biodiversity preservation on-site and ensuring the group meets its ISO 14001 commitments. You will be the guardian of the Group's environmental performance indicators, tracking progress against the 2030 roadmap.

What are the main challenges someone in this role might face?

A primary challenge will be fostering behavioral change across a decentralized organization with various regional agencies. You will need to convince operational teams that low-carbon requirements are not just constraints but competitive advantages. Balancing technical excellence with resource management is another hurdle. You must prioritize a diverse portfolio of projects while maintaining a high standard of quality for environmental reporting and tool development in a rapidly changing regulatory environment.

How could a typical day look like for someone in this position?

A typical day might begin with a coordination meeting with your team to review the pipeline of building LCAs and resource allocation. You might then transition to a meeting with regional directors to discuss the deployment of new carbon training modules. In the afternoon, you could be analyzing regulatory shifts in French environmental law or working on a strategic presentation for the Executive Committee. The day often concludes with stakeholder engagement, perhaps representing the firm at a professional network event or a commercial pitch for a sustainable project.

What are the opportunities for professional growth and development in this role?

Success in this role could lead to a Direction-level position within the Environmental or CSR departments. As the company diversifies into energy renovation and real estate, there are opportunities to lead new specialized business units. Furthermore, this role offers high visibility within the French BTP ecosystem, positioning you as a leading expert in sustainable construction. You will have the platform to become a key influencer in how the industry adapts to climate change.

The main stakeholders you might be interacting with

You will report directly to the Director of Environment and manage a team of low-carbon specialists. You will also work closely with regional agency referents and their respective management teams to ensure strategy implementation. Externally, you will interact with professional networks, regulatory bodies, and clients during commercial events. You will be the face of Léon Grosse's environmental ambition, building relationships with partners in the circular economy and low-carbon technology sectors.

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