Claire Gueydan-O'Quin Partner, Global Co-Head of Real Estate

Professional Background

Claire Gueydan-O’Quin is a Partner at Forvis Mazars, specializing in financial services and real estate advisory at a global level. An auditor by training, she holds two Master’s degrees in Business Law and in Audit & Corporate Governance. She joined Mazars in 2000 in Paris.

Early in her career, she spent five years in Madrid, where she contributed to the creation of the banking audit and advisory practice at Mazars Spain, supporting French companies in their expansion within a fast-growing market.

She became a Partner in 2011, and is responsible for signing the accounts of major international real estate groups headquartered in France.

Claire leads the global real estate practice at Forvis Mazars, bringing together more than 250 professionals worldwide. The practice advises a broad ecosystem of clients, including real estate developers, landowners, investment funds, and corporates for whom real estate is a strategic asset, particularly in relation to finance, operations, and workplace strategy.

She also leads the firm’s global network of French Desks across 92 countries, supporting French corporates and PIE groups in their international expansion.

In 2019, she was appointed French Foreign Trade Advisor (CCEF) by the French government in recognition of her contribution to the development and international promotion of French businesses.

Areas of Expertise

• Global Real Estate Advisory & Audit
• Financial Services Audit & Advisory
• International Group Reporting (PIE & Listed Entities)
• Real Estate Investment Funds & Developers
• Corporate Real Estate Strategy (Workplace & Finance Functions)
• Cross-Border Expansion & French Desk Network Leadership
• Banking & Financial Sector Advisory
• International Business Development (Europe & Global Markets)