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Chef de projet RSE

Mexens ex.Technique Solaire • France • Added on Jul 31, 2026
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As a CSR Project Manager apprentice, you will support the deployment of a recently refined sustainability strategy across the group’s diverse energy activities. You will act as a central hub for data, coordinating carbon footprint assessments, extra-financial reporting, and the monitoring of action plans across biodiversity, circular economy, and inclusive purchasing. Your daily life involves transforming complex regulatory requirements into actionable internal processes and engaging communication tools.

This role is a unique opportunity to embed sustainability at the heart of the energy transition. Working within a multi-energy producer, you will help bridge the gap between technical renewable energy deployment and measurable social and environmental impact. By focusing on both local territorial development and global climate goals, you ensure that the company’s growth to 4 GW of production remains ethically sound and environmentally regenerative.

This suits someone who is currently pursuing a Master’s degree in engineering or business with a specialized focus on sustainable development. You should be a curious communicator who thrives on transversal project management and possesses the analytical rigor needed for high-quality ESG reporting.

Job FAQs

What are the main missions and responsibilities of this role?

The apprentice will be a cornerstone in the execution of the CSR strategy, specifically assisting the CSR Manager in rolling out initiatives across environmental, social, and governance pillars. You will own the collection and consolidation of extra-financial KPIs, contributing directly to voluntary and regulatory reporting frameworks. Beyond data, you will actively manage transversal projects such as biodiversity protection and the implementation of responsible purchasing policies. Your role also includes creating internal awareness through workshops like the Climate Fresk and conducting regulatory monitoring to keep the group ahead of evolving sustainability standards.

Key learning opportunities for this job

Working under a mentor with 15 years of experience, you will gain deep expertise in ESG reporting cycles and carbon accounting methodologies. This position offers a front-row seat to how a fast-scaling energy company navigates the energy and agricultural transitions simultaneously. You will also develop skills in change management and internal consulting, learning how to interface with various departments like finance, operations, and HR to integrate sustainability into their core workflows. Exposure to international projects in India or the Netherlands may provide insights into global ESG challenges.

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

The successful candidate is likely a Master's student (BAC+4/5) from an engineering or business school with a clear specialization in Sustainability or CSR. You must demonstrate a genuine interest in renewable energy and the intersection of technology and social impact. Soft skills are paramount here; you need to be autonomous, organized, and possess the interpersonal ease required to lead workshops and influence colleagues. A proactive mindset, where you feel comfortable proposing new processes rather than just following existing ones, will make you stand out.

Advice to stand out and make a successful application

Since the company emphasizes their values of excellence and durability, focus your application on quality over quantity. Skip the generic cover letter as requested and ensure your CV highlights specific technical skills like carbon footprinting tools or experience with CSR frameworks. During the interview, show that you understand the dual nature of their business — energy production and agricultural transition. Researching their specific biogas and solar projects will demonstrate a level of commitment and curiosity that aligns with their collaborative and ambitious culture.

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

The role focuses heavily on the decarbonization of the economy and the sustainable development of territories. You will likely spend significant time on the 'Valoriser' (Environmental) pillar, specifically tracking the carbon impact of solar and biogas infrastructures. Social impact is also a major focus, particularly regarding diversity and inclusion within the workforce and ensuring human rights are respected throughout the international supply chain. You will help ensure that the transition to 4 GW of energy production is done with ethical governance at its core.

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

One of the primary challenges will be the transversality of the role; you will need to gather data and buy-in from busy teams who may prioritize operational targets over CSR reporting. Navigating a recently clarified strategy means you may encounter legacy processes that need updating. Additionally, keeping up with the rapidly changing regulatory landscape in France and Europe regarding extra-financial reporting will require constant vigilance and the ability to synthesize complex information into simple internal directives.

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

A typical day might begin with a coordination meeting with the CSR Manager to review progress on carbon footprint data collection. You might spend the late morning analyzing energy production data to calculate avoided emissions or drafting a policy for responsible purchasing. In the afternoon, you could lead a sensitization workshop for new employees or meet with the finance team to discuss KPI alignment. The day often ends with regulatory monitoring or preparing communication materials to share sustainability successes with the rest of the group.

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

This apprenticeship is designed as a path toward professional autonomy. The internal 'Mexens Academy' offers high-quality training and thematic pathways that allow you to sharpen specific technical skills while on the job. Given the group's ambitious growth targets for 2030, there is potential for this role to evolve into a permanent position. The exposure to the CFO and other high-level stakeholders provides excellent visibility for future leadership roles within the growing sustainability department.

The main stakeholders you might be interacting with

You will report directly to the Group CSR Manager and operate within the Finance department, ensuring close links with corporate strategy. You will also interact frequently with Operational Project Managers who build and maintain solar and biogas sites. External interactions might include NGO partners, sustainability auditors, and suppliers. Internally, you will be a key point of contact for HR and Communication teams to ensure CSR values are reflected in employee engagement and corporate messaging.

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