ESG Audit and Sustainability Assurance

ESG Audit

The CSRD requires companies to have their sustainability report independently audited. We prepare your ESG reporting for audit under ESRS and guide you through the entire assurance process from materiality assessment to assurance opinion.

  • Preparation for Limited and Reasonable Assurance under ISAE 3000
  • ESRS conformity review and data quality assurance for all ESG metrics
  • Gap analysis between current reporting and assurance requirements
  • End-to-end support through the CSRD audit cycle incl. remediation

Your strategic success starts here

Our clients trust our expertise in digital transformation, compliance, and risk management

30 Minutes • Non-binding • Immediately available

For optimal preparation of your strategy session:

  • Your strategic goals and objectives
  • Desired business outcomes and ROI
  • Steps already taken

Or contact us directly:

Certifications, Partners and more...

ISO 9001 CertifiedISO 27001 CertifiedISO 14001 CertifiedBeyondTrust PartnerBVMW Bundesverband MitgliedMitigant PartnerGoogle PartnerTop 100 InnovatorMicrosoft AzureAmazon Web Services

ESG Audit

Our Expertise

  • Experience from over 50 CSRD implementation projects in regulated industries
  • In-depth knowledge of assurance requirements under ISAE 3000 and IDW PS 980
  • Cross-industry expertise in financial services, manufacturing and retail
  • Structured methodology from gap analysis to assurance confirmation

CSRD Audit Requirement

From fiscal year 2024, CSRD-obligated companies must have their sustainability report confirmed by an independent auditor. Early preparation reduces audit findings and ensures timely publication.

ADVISORI in Numbers

11+

Years of Experience

120+

Employees

520+

Projects

In five steps, we prepare your organisation for the ESG audit — structured, transparent and assurance-ready.

Our Approach:

Analyse your current sustainability report and underlying data processes

Gap analysis: compare against ESRS requirements and assurance standards

Build audit-ready data collection and control processes

Mock audit to identify remaining weaknesses

Support during external audit and assistance with remediation

"ESG audits are the key to sustainable corporate governance and long-term value creation. Our systematic audit approaches enable companies not only to assess and improve their sustainability performance, but also to identify strategic opportunities and proactively manage risks. In doing so, we combine technical excellence with strategic sustainability consulting and regulatory compliance."
Andreas Krekel

Andreas Krekel

Head of Risk Management, Regulatory Reporting

Expertise & Experience:

10+ years of experience, SQL, R-Studio, BAIS-MSG, ABACUS, SAPBA, HPQC, JIRA, MS Office, SAS, Business Process Manager, IBM Operational Decision Management

Our Services

We offer you tailored solutions for your digital transformation

ESG Assessment Framework & Methodology Development

Development of comprehensive ESG assessment frameworks and standardised evaluation methodologies for systematic sustainability assessments.

  • Customised ESG Assessment Framework Design and Methodology Development
  • International Standards Integration and Best Practice Alignment
  • Multi-Stakeholder Assessment Approaches and Materiality Analysis
  • Performance Metrics Definition and KPI Framework Development

Environmental Impact Assessment & Climate Risk Evaluation

Comprehensive assessment of environmental impacts and climate risks with detailed analysis of environmental performance and sustainability impacts.

  • Carbon Footprint Assessment and Greenhouse Gas Emissions Analysis
  • Climate Risk Assessment and Physical Risk Evaluation
  • Environmental Management Systems Audit and ISO 14001 Compliance
  • Biodiversity Impact Assessment and Natural Capital Evaluation

Social Performance Audit & Stakeholder Engagement Assessment

Detailed assessment of social performance and stakeholder engagement with a focus on human rights, labour practices and community impact.

  • Human Rights Due Diligence and Labour Standards Assessment
  • Diversity, Equity & Inclusion Audit and Workplace Culture Evaluation
  • Community Impact Assessment and Stakeholder Engagement Review
  • Supply Chain Social Compliance and Vendor Assessment

Governance Excellence Review & Board Effectiveness Evaluation

Comprehensive assessment of corporate governance structures and board effectiveness with a focus on transparency, accountability and ethical leadership.

  • Board Composition and Independence Assessment
  • Executive Compensation and Incentive Alignment Review
  • Risk Management Framework and Internal Controls Evaluation
  • Ethics and Compliance Programme Assessment

ESG Due Diligence & Investment Assessment

Specialised ESG due diligence services for investments, acquisitions and strategic partnerships with detailed risk-return analysis.

  • Pre-Investment ESG Due Diligence and Risk Assessment
  • ESG Integration Strategy and Value Creation Planning
  • Sustainability Performance Benchmarking and Peer Analysis
  • ESG Risk Mitigation Planning and Action Plan Development

ESG Reporting & Regulatory Compliance Documentation

Comprehensive ESG reporting services and regulatory compliance documentation for transparent sustainability reporting.

  • Sustainability Report Preparation and GRI Standards Compliance
  • TCFD Reporting and Climate Disclosure Documentation
  • EU Taxonomy Compliance and CSRD Reporting Preparation
  • ESG Data Management and Performance Monitoring Systems

Our Competencies in Regulatory Compliance Management

Choose the area that fits your requirements

ESG Assessment

A systematic ESG assessment forms the foundation for every successful sustainability strategy. We support you in comprehensively evaluating your ESG performance and developing data-driven improvement measures.

ESG Certification

Strengthen your company's sustainability credibility through recognised ESG certifications. We guide you from gap analysis through preparation to successful certification under ISO 14001, EcoVadis or B Corp.

ESG Dashboard

Our ESG Dashboard provides you with a central, intelligent platform for visualising and managing your sustainability performance. Transform complex ESG data into well-founded decision-making insights for executive leadership.

ESG Data Management: Collect & Govern Sustainability Data

Establish a solid data foundation for your ESG strategy with automated collection processes, validated data quality, and integrated reporting solutions for maximum transparency and compliance.

ESG Due Diligence

ESG due diligence enables the systematic assessment of environmental, social, and governance factors in investment and business decisions. We support you in identifying and evaluating ESG risks and opportunities.

ESG Governance Consulting | Build Sustainability Governance | ADVISORI

ESG governance forms the strategic foundation for sustainable corporate management. We support you in implementing effective governance structures that systematically integrate ESG aspects into decision-making processes.

ESG Metrics

Transform your sustainability strategy into measurable results. We develop and implement tailored ESG metrics systems that make your performance transparent and provide a sound basis for strategic decisions.

ESG Rating

ESG ratings are becoming increasingly important for companies in terms of financing, investor relations, and market access. We help you improve your ESG performance and achieve better ratings.

ESG Reporting

Navigate CSRD obligations and build audit-ready ESG reports. We implement ESRS-aligned reporting frameworks � from double materiality assessment and EU Taxonomy alignment to stakeholder disclosure � turning complex sustainability requirements into strategic advantage.

ESG Strategy

A well-conceived ESG strategy is essential today for long-term business success. We support you in developing and implementing a sustainable strategy that integrates environmental, social, and governance aspects into your business processes.

ESG Supply Chain Due Diligence Act

The German Supply Chain Due Diligence Act (LkSG) obliges companies to comply with human rights and environmental standards in their supply chains. We support you in achieving full implementation and sustainable compliance.

ESG Sustainability Report

Our ESG sustainability report service transforms complex sustainability data into compelling, compliance-ready reports that impress investors, satisfy regulators and strengthen your market position as a sustainability leader.

ESG Training

Practical ESG training for all organisational levels: from CSRD compliance and EU Taxonomy to industry-specific sustainability topics. ADVISORI develops tailored training programmes that build ESG competencies effectively.

ESG Transformation

ESG transformation means the systematic integration of environmental, social, and governance principles into all aspects of your business operations. We accompany you on the path to a sustainable and future-ready organization.

Frequently Asked Questions about ESG Audit

What does an ESG audit specifically examine?

An ESG audit examines the completeness and accuracy of the sustainability report. The auditor evaluates the materiality assessment, data collection processes, compliance with ESRS data points and the internal control structure. The goal is an assurance opinion that gives stakeholders confidence in the reported ESG data.

Which companies are subject to CSRD audit requirements?

The CSRD audit requirement applies in phases: from

2025 large listed companies (previously reporting under NFRD), from

2026 all large companies with over

250 employees or EUR

50 million revenue, from

2027 listed SMEs. Across the EU, approximately 50,

000 companies are affected, including around 15,

000 in Germany.

How does an ESG audit under ISAE 3000 work?

The auditor first scopes the audit based on the materiality assessment. Data collection processes and internal controls are then evaluated, reported metrics are checked for plausibility and consistency, and ESRS compliance is confirmed. The audit concludes with the assurance report (audit opinion).

What is the difference between an ESG audit and an ESG rating?

An ESG audit is a formal examination of the sustainability report by an independent auditor resulting in an assurance opinion. An ESG rating is an assessment of sustainability performance by a rating agency (e.g. MSCI, Sustainalytics) based on publicly available information. Both complement each other but serve different audiences.

How long does ESG audit preparation take?

Preparation time depends on the maturity of ESG reporting. Companies falling under the CSRD for the first time should plan for

9 to

12 months. Companies with existing GRI reports typically need

4 to

6 months for ESRS alignment. Conducting a mock audit early is the single most important step for risk mitigation.

What are typical findings in ESG audits?

The most common audit findings include: missing or incomplete data points for ESRS standards, insufficient documentation of data collection methodology, inadequate internal controls for ESG data, gaps in the double materiality assessment and lack of traceability for Scope

3 emissions.

How does ADVISORI support ESG audit preparation?

We systematically prepare companies for the ESG audit: from gap analysis through building audit-ready processes to support during the external audit. We act independently of the auditor and ensure your sustainability report meets the requirements for Limited or Reasonable Assurance.

Success Stories

Discover how we support companies in their digital transformation

Digitalization in Steel Trading

Klöckner & Co

Digital Transformation in Steel Trading

Case Study
Digitalisierung im Stahlhandel - Klöckner & Co

Results

Over 2 billion euros in annual revenue through digital channels
Goal to achieve 60% of revenue online by 2022
Improved customer satisfaction through automated processes

AI-Powered Manufacturing Optimization

Siemens

Smart Manufacturing Solutions for Maximum Value Creation

Case Study
Case study image for AI-Powered Manufacturing Optimization

Results

Significant increase in production performance
Reduction of downtime and production costs
Improved sustainability through more efficient resource utilization

AI Automation in Production

Festo

Intelligent Networking for Future-Proof Production Systems

Case Study
FESTO AI Case Study

Results

Improved production speed and flexibility
Reduced manufacturing costs through more efficient resource utilization
Increased customer satisfaction through personalized products

Generative AI in Manufacturing

Bosch

AI Process Optimization for Improved Production Efficiency

Case Study
BOSCH KI-Prozessoptimierung für bessere Produktionseffizienz

Results

Reduction of AI application implementation time to just a few weeks
Improvement in product quality through early defect detection
Increased manufacturing efficiency through reduced downtime

Let's

Work Together!

Is your organization ready for the next step into the digital future? Contact us for a personal consultation.

Your strategic success starts here

Our clients trust our expertise in digital transformation, compliance, and risk management

Ready for the next step?

Schedule a strategic consultation with our experts now

30 Minutes • Non-binding • Immediately available

For optimal preparation of your strategy session:

Your strategic goals and challenges
Desired business outcomes and ROI expectations
Current compliance and risk situation
Stakeholders and decision-makers in the project

Prefer direct contact?

Direct hotline for decision-makers

Strategic inquiries via email

Detailed Project Inquiry

For complex inquiries or if you want to provide specific information in advance