About Guillaume
French
Native or bilingual
English
Fluent
Experience
- EY Société d'AvocatsDirector - International Tax and Transaction ServicesCONSULTING AND AUDITSJanuary 2026 - July 2026 (6 months)Puteaux, France- Supervision of tax function transformation projects within the financial sector: regulatory transformation, strengthening risk control framework, operational model performance, tax responsibility and reputation- Business development and team management participation
- Société GénéraleHead of Cross-Functional Tax Projects and RegulationsBANKING AND INSURANCEJanuary 2023 - December 2025 (2 years and 11 months)Puteaux, France- Regulatory Compliance:
- Supervision of a department of 6 people responsible for projects and expertise in client tax regulations (CRS, FATCA, QI) and for own account (electronic invoicing, CbCR, tax havens, DAC 6, etc.).
- Sponsor of the implementation project for the OECD Pillar 2 reform (presentation to the board of directors, project and governance structuring, tax team management).
- Representation with professional associations (e.g., FBF, AFEP).
- Subsidiary Supervision:- Supervision of the 300 most significant entities (tax amounts, risks, tax audits, litigation, documentation and reporting obligations, etc.)
- Sponsor of the project to replace the Group's tax tool
- Oversight of Establishments and Operations:- Management of business expansion in countries with tax reputation risk, periodic review, and definition of risk reduction action plans.
- Société GénéraleHead of Corporate CbCR and CRD IV ReportingBANKING AND INSURANCEJanuary 2018 - December 2022 (4 years and 11 months)Puteaux, France
- Regulatory Reporting: Supervision of the production of CbCR and CRD IV reports for all Group entities.
- Data and Risk Analysis: Review of financial data and key ratios for over 1200 subsidiaries in 80 countries.
- International Coordination: Providing expertise and interface with subsidiaries concerned by local obligations in over 50 countries.
- Non-financial Reporting: Responses to non-financial surveys on tax strategy. Annual publication of the SG Group's public tax transparency report.
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Education
- Master in ManagementESCP Business School2011Master en Management - Spécialité ingénierie juridique et financière