Claire Dusser Partner

Claire Dusser

Professional Background

Claire Dusser is a Partner at Forvis Mazars, specializing in audit and IFRS technical expertise. A graduate of ESCP Europe, she began her career at Mazars as an auditor in Germany, before joining the Paris office in 2004, where she worked on major listed and regulated groups such as EDF, Danone, and SNCF.

She was appointed Partner in 2023.

IFRS & Technical Accounting Expertise

Claire Dusser has developed deep expertise in International Financial Reporting Standards (IFRS), particularly in complex and evolving accounting areas such as:

  • Lease accounting and concession contracts
  • Revenue recognition and control analysis
  • IFRS transition and implementation projects
  • Presentation of financial statements in regulated sectors
  • Accounting treatment of crypto-assets and emerging financial instruments

She leads both audit and advisory IFRS engagements, supporting clients through complex technical accounting challenges.

International Leadership & Standard-Setting Contribution

Claire Dusser is actively involved in national and international accounting standard-setting bodies and represents Forvis Mazars in professional forums.

As the leader of the International IFRS Committee at Forvis Mazars, she:

  • Supports member firms across the global network
  • Develops technical IFRS expertise worldwide
  • Promotes consistency and excellence in complex accounting interpretations
  • Oversees the development of new IFRS-related service offerings

Areas of Expertise

  • IFRS Accounting Standards & Implementation
  • Complex Financial Reporting (Revenue, Leases, Concessions)
  • Audit of Listed and Regulated Entities
  • Emerging Accounting Topics (Crypto-assets, new instruments)
  • International Accounting Governance & Standard-Setting
  • Technical Accounting Advisory Services
  • Global IFRS Knowledge Development & Training

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