Securing sustainability information
Authorized to certify sustainability information by H2A and accredited by COFRAC* for the audit of mission companies, we ensure the sincerity and reliability of ESG information published voluntarily or to meet legal obligations.
Ensuring the transparency and compliance of your sustainability information
For 10 years, we have been supporting ETIs and SMEs to help them meet the demands of their clients or their funders in terms of ESG and to comply with their regulatory obligations. Since 2015, the Sustainability team at Nexia S&A has acquired solid expertise in the ESG issues of many business sectors, their regulatory context, as well as key tools and frameworks.
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Secure the company in the face of regulatory changes and limit risks for your stakeholders.
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Strengthen the robustness of your data to highlight your overall performance.
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Maintain an exemplary reputation and increase the competitive advantage of your company with its stakeholders.
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Reconciling the robustness of your ESG management system while maintaining your operational agility.
A qualified and experienced team at the service of your needs
Empowered by H2A and accredited COFRAC* like OTI, we certify the reliability of your ESG information — whether it meets legal obligations (CSRD, green taxonomy, Sapin II law...) or is part of a voluntary approach (CSR, VSME, company with a mission, impact credits, etc.). We also conduct blank audits to identify and correct non-conformities before publication.
*Aca Nexia is an OTI accredited according to the ISO/IEC 17029 standard by COFRAC, validation/verification activity, No. 3-2162 rev. 1 (scope available on www.cofrac.fr).
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Certify sustainability reports in accordance with CSRD, ESRS standards, and taxonomy regulations.
Verify voluntary CSR reports based on VSME.
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Verify the quality of mission companies.
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Control risk management systems (Sapin II, supplier audits, etc.).
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Verify the ESG criteria for impact credit contracts.
Attest greenhouse gas emissions balances and validate climate dividends.
What our team can do for you
Throughout our missions, we secure your extra-financial data and create value through feedback and targeted recommendations, in a pragmatic and tailor-made approach taking into account your organization, your risks and opportunities, and your regulatory environment. Our network of international ESG correspondents also guarantees you smooth support across several countries or globalized value chains, with a detailed understanding of the issues specific to each geography.
Your contacts master regulations (CSRD, Green Taxonomy, VSME, etc.) and conduct training courses on ESG topics (Middlenext, Lefebvre Dalloz).
You benefit from an experienced team and proven methodologies based on 6 CSRD EIP audit mandates and more than 20 recurring mandates in various sectors, from SMEs to listed multinationals.
Our dedicated team is committed to understanding your challenges in order to offer you a tailor-made approach that adapts to your operational constraints.
You benefit from accessible contacts guaranteeing a smooth organization of the mission, with clear management and controlled deadlines.
Rigorous support, supported by an accredited and experienced team
Accredited by the H2A and accredited by COFRAC, Nexia S&A certifies the reliability of sustainability information from SMEs and ETI, whether it meets the CSRD, the green taxonomy or a voluntary approach.
We speak the same language. What we value above all are shared values: humility, technicality and a sense of responsibility.
Our sustainability audit experts
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Our useful resources
Our content helps you better understand your challenges, anticipate changes and discover what's behind the scenes at Nexia.
Our expertise at the service of your ambitions
Your business is evolving, transforming, developing. At every stage, we help you address key challenges with pragmatism and commitment.
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Let's discuss your challenges in concrete terms
Whether it is to structure your growth, make your data reliable or to succeed in a strategic operation, one of our partners answers you personally and without commitment.
Do you have questions?
Here is what our customers ask us most often before starting a mission.
We work mainly with ETIs, growing SMEs, family groups or subsidiaries of international players. Our teams are used to complex and multi-structured environments.
We have had 5 offices located in Île-de-France and one in Lyon since the beginning of 2026, but our membership in the international Nexia network allows us to support you in more than 120 countries.
Nexia is a global network of independent firms operating in more than 120 countries. We share common quality standards, which allows us to offer global support while maintaining a close relationship.
An associate contacts you again to understand your challenges, without commitment. We analyze your needs in order to offer personalized support.
Audit, accounting expertise, financial and operational advice, taxation and company law. Our services are designed to cover all the challenges of financial departments.
Yes, we work on recurring missions as well as on targeted projects: strategic operations, reorganization, flash diagnosis...