Olivier Thireau Partner

Professional Background

Olivier Thireau is a Partner at Forvis Mazars, specializing in the Real Estate and Construction (BTP) sector. He began his career at Mazars in 1994, and is a graduate in MSTCF, as well as a Chartered Accountant and Statutory Auditor.

He became a Partner in 2005 and has been responsible for the Real Estate & Construction practice since 2017, based in Paris.

Sector Expertise & Advisory Focus

Olivier Thireau supports clients across several industries, including:

• Construction and civil engineering (BTP)
• Real estate development and investment
• Oilfield services (parapetroleum services)
• Media sector

He has developed strong expertise in:

• Project financing and structured finance
• Internal control system transformation
• Audit and advisory for large industrial and construction groups

Thought Leadership & Publications

He actively contributes to sector research and publications on the European construction industry. His studies cover major trends affecting the sector, including crisis resilience, international expansion, valuation, and sustainability.

Key publications include analyses on:

• European construction majors and crisis cycles (2012–2021)
• Internationalization of construction groups
• Sector valuation trends
• COVID-19 impact on the construction industry
• Green taxonomy and sustainability challenges in construction (2022)

Areas of Expertise

• Real Estate & Construction (BTP) Advisory
• Project Finance & Structured Financing
• Audit of Large Construction Groups
• Internal Control & Risk Management
• Oilfield Services & Media Sector Expertise
• Strategic Sector Analysis & Publications
• Sustainability & Green Taxonomy in Construction
• Financial Transformation of Infrastructure Companies