Preparing for External Assurance for ESRS Reporting

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Preparing for External Assurance for ESRS Reporting overview: 

Be assurance-ready. Build trust, avoid surprises, and meet CSRD expectations.

External assurance is no longer optional—it’s becoming central to credible sustainability reporting under the CSRD. But what does assurance actually involve, and how can you ensure your organization is prepared?

This focused FBRH course demystifies the external assurance process, with practical steps to align your reporting systems, timelines, and documentation with what auditors—and regulators—expect.

You’ll learn to:
• Understand the purpose, value, and growing momentum behind external assurance
• Navigate the assurance process: from timing and costs to the shift from limited to reasonable assurance
• Identify the most widely used assurance standards (e.g., ISAE 3000, AA1000AS)
• Understand how CSRD requirements influence assurance obligations—and how national variations may impact you Structure your internal systems and controls for a smoother, audit-ready reporting process

Who should take this course?
Perfect for sustainability managers, compliance officers, reporting leads, and consultants involved in ESRS or CSRD reporting—and anyone supporting audit readiness.
✅ Based on GRI’s leading assurance guidance
✅ Step-by-step roadmap to prepare internal teams and systems
✅ Addresses both current compliance and future-proofing for reasonable assurance

At FBRH, we equip you not just to comply—but to earn trust.
Join us and be confident your sustainability report is ready for independent assurance.

What participants are saying

“I started this journey with very little knowledge or idea of how to tackle our company reporting. Having completed the courses, I feel well equipped to take on the challenge. The fact that Simon is available for follow-up questions and advice is an added bonus!”
Anna Cook – CERN HSE Communications

Why choose this program?

As ESRS becomes the new norm under EU law, companies must adopt structured, transparent, and independently assured Sustainability Reporting. The course empowers you to:

• Train with FBRH—one of the original GRI Certified Training Providers, renowned for high-impact learning, over 200 five-star endorsements, and a trusted training partner to some of the world’s largest companies.
• Build and lead CSRD-compliant ESRS reports.
• Conduct rigorous ESRS double materiality assessments grounded in GRI, OECD, UNGPs & SDG frameworks.
• Engage stakeholders systematically and meet disclosure expectations.
• Prepare robust data for external assurance.
• Align digital reporting formats for CSRD.
• Prepare with the exclusive FBRH mock exam—free for all course participants—and take the next step to pass the GRI ESRS Certification Exam and become a recognised ESRS sustainability expert.

The complete course bundle

Six GRI Certified Courses Delivered by Expert Trainers

• Introduction to the CSRD and Reporting with the ESRS
  Learn the structure of the CSRD and ESRS, and how to plan your reporting process.
• Stakeholder Engagement for ESRS Reporting
  Master techniques to identify, prioritise, and engage stakeholders effectively.
• Double Materiality Assessment under the ESRS
  Conduct impact and financial materiality assessments aligned with regulatory expectations.
• How to Collect and Report Material Information under the ESRS
  Learn systems and tools for capturing relevant, verifiable sustainability data.
• Preparing for External Assurance for ESRS Reporting
  Understand assurance standards, evidence requirements, and how to reduce audit risk.
• Digital Reporting under the CSRD
  Explore digital tagging, ESEF/HTML formats, and how to prepare machine-readable reports.

Outcomes you can expect

• GRI Certified Pathway Completion
  Gain certificates from GRI and CPD. Full preparation for the GRI ESRS Certification Exam.
• Immediate Practical Skills
  Receive templates, case studies, and an FBRH action plan to implement what you learn.
• Professional Recognition
  Become a GRI Certified ESRS Sustainability Professional—your name listed on the GRI website.

Learning formats

Classroom Delivery: London School of Economics (3 Days)
Remote Learning: Live via Zoom (3 Days)

Includes group exercises, breakout sessions, expert feedback, and live Q&A.

Course fees

Full Bundle Price:

£2400* (Classroom Delivery: London School of Economics)
£1300* (Remote Learning)

Includes all six certified courses, free mock exam access, templates, and course completion certificates.

*VAT where applicable

VAT applies to UK participants and all participants taking the UK based classroom course. Group discounts available.

Expert trainer: Simon Pitsillides

• MBA (Oxford Brookes University)
• University of Cambridge business courses: “Sustainable Finance”, “Sustainable Supply Chain Management”
• GRI Nominated Trainer
• Institute of Sustainability and Environmental Professionals (ISEP) Trainer
• Fellow of Institute of Sustainability and Environmental Professionals (ISEP)
• Fellow of Chartered Institute of Marketing (CIM)
• Member of the Chartered Institute of Journalism (CIoJ)
• 200+ Course Reviews ★★★★★
• Practical, clear, implementation-driven instruction
• Editor: www.sustaincase.com

Free mock exam

All participants receive exclusive access to the FBRH GRI ESRS Certification Mock Exam—test your readiness and reinforce your learning.

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