Yann began his career as an Administrator at the French National Assembly, where he focused on personal data law and criminal law and criminal investigations. He also served as Secretary General of the CNIL—France’s data protection authority—where he notably built the CNIL’s enforcement and technological capacities. Yann was also involved in the early negotiation of the GDPR at the EU level. 

In private practice, Yann has focused on enforcement and sanction proceedings by Regulators at the pan-European and French levels on complex cases involving cross-border processing and multinational companies. 

In addition to regulatory investigations matters, Yann also advises companies on cybersecurity issues and internal investigations. His practice centers on finding innovative solutions for the novel regulatory responses that companies face. 

In 2019, Yann was appointed “country leader” for France by the International Association of Privacy Professionals (IAPP). He was also named “strategic advisor” from 2016 to 2019 by the Information Commissioner’s Office (ICO) —the UK’s Data Protection Authority —on the interplay between innovation and regulation (“sandbox” initiative).