Assurance services

Assurance teams serve the public interest by promoting trust and confidence in business and the capital markets.

EY Assurance services – comprising Audit, Climate Change and Sustainability Services (CCaSS), Financial Accounting Advisory Services (FAAS), Forensic & Integrity Services (Forensics), and Technology Risk – address risk and complexity, while identifying opportunities to enhance trust in the capital markets.

Audit and Technology Risk teams serve the public interest by providing high-quality, analytics-driven audits and other assurance services with independence, integrity, objectivity and professional skepticism.

CCaSS, FAAS, Forensics and Technology Risk teams help protect and restore enterprise and financial reputations and help support the finance function in enhancing decision-making and efficiency. Moreover, they help clients address data, technology and sustainability risks and opportunities, turning ambition into action. Thanks to the global experience of Assurance talent and innovative technology, they help clients navigate complex reporting standards.

Together, EY Assurance services help protect and promote sustainable, long-term value for stakeholders.

Our latest thinking

How new EU taxonomy rules are reshaping sustainability reporting

Discover key findings from the 2025 EU Taxonomy Barometer. Learn about new rules, challenges and actions for better sustainability reporting. Read more.

Dr. Christian Orth

What is the agenda for reimagining more strategic, future-looking boards?

Explore how boards can evolve governance. Discover six recommendations for building resilient, future-ready leadership.

How can reporting shape a nature-positive future?

The EY Global Nature Action Barometer suggests that companies have not yet developed sufficiently robust reporting on nature. Read why.

Dr. Velislava Ivanova

How can you navigate your IPO planning with confidence?

The EY Global IPO Trends covers news and insights on the global IPO market for Q3 2025 and an outlook for Q4 2025. Learn more.

George Chan

Case Study The better the question The better the answer The better the world works

How EY teams applied the principles of digital transformation to the audit

Technology-enabled transformation isn’t just something the EY organization delivers for other companies. Discover how digital transformation created an audit that provides deeper insights for clients.

View case study

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The better the question

Could better connectivity drive a more insightful audit?

The audit has become a digital process, bringing new challenges for auditors and the companies they work with. Continue reading

The better the answer

A centralized, globally connected platform

The EY Digital Audit provides a consistent approach for companies around the world. Continue reading

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The better the world works

A combination of technology and teaming that inspires trust

How the EY Digital Audit enhances transparency and accountability. Continue reading

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Careers at EY

At EY, you’ll have the chance to build a career as unique as you are, with the global scale, support, inclusive culture and technology to become the best version of you.

The team

Marie-Laure Delarue

EY Global Vice Chair — Assurance

Agent of change. Passionate about talent. Driver of innovation. Bilingual. Enjoys wine tasting.

Paris La Défense, France

Marc Jeschonneck

EY Global Assurance Digital Leader

Focused on further accelerating the digital audit experience and driving innovation in a disruptive environment. Continuously seeks new experiences and inspiration for new ideas.

Hamburg, Germany

Andreas Toggwyler

EY Global Assurance Client Technology Officer

Trusted advisor for global financial services firms on data, technology, operations and sourcing. Devoted to family, music, sports and cooking.

Geneva, Lancy, Switzerland

Dilek Çilingir

EY Global Forensic & Integrity Services Leader

Global Forensics leader with almost 30 years of experience in Assurance and Consulting. Problem solver. Passionate about technology but who never forgets the future of transformation is human.

London, United Kingdom

Nicolas Lecoq

EY Global and Americas Financial Accounting Advisory Services Leader

Trusted business advisor. Global citizen. Loving husband and father. Sports enthusiast.

Washington DC, United States

Shelly Fliehe

EY Global Technology Risk Leader

Client-driven. Problem solver. Empathetic leader. Boy mom. Ravenous reader. All in.

Minneapolis, MN, United States

Sandra Oliver

EY Global Assurance Talent Leader

Driving the Talent agenda for 130,000 professionals. 25+ years across various sectors resolving complex business issues, mentoring future leaders, fostering inclusivity. Proud mother of three sons.

Houston, TX, United States

Alexis Gazzo

EY Global Climate Change and Sustainability Services Leader

Passionate about climate and energy transition. 25 years’ experience in sustainability. Father of 3. Swimmer.

Jeremy Thurbin

EY Global Assurance Quality Leader

Over three decades of international experience. Dual French and British nationality.

Amy King

EY Global Assurance Vice Chair — Professional Practice

Globally connected. Focused on what’s next in risk and innovation. Passionate about helping global teams drive audit quality to serve the public interest. Enjoys time with family and new experiences.