Mr Olivier Proust > Fieldfisher > Brussels, Belgium > Lawyer Profile


Work Department

Privacy and data protection


Partner, joined the firm in April 2013


Olivier is a European-qualified lawyer specializing in the field of privacy, data protection and data security law. He assists companies of all sizes and across sectors to comply with the General Data Protection Regulation (GDPR) including how to implement a GDPR compliance program, data mapping and data processing inventories, data protection impact assessments, Data Protection Officer, one-stop-shop, privacy policies, rights of the data subjects, and drafting/negotiating privacy clauses in data processing agreements. He also helps multinational organizations to implement global privacy compliance programs and in particular to comply with data export restrictions (such as binding corporate rules, the EU standard contractual clauses, and the EU-US Privacy Shield). He also advises companies on data security incident issues, including data security breach notification requirements to the national supervisory authorities. He advises on all aspects of technology law (drones, cloud computing, social networking, geolocation), consumer privacy protection (e-privacy, direct marketing, cookies), employee privacy rights (employee monitoring, whistleblowing, corporate investigations, e-discovery).

Finally, he assists companies in the context of inspections and audits carried out by the national data protection authorities, such as the CNIL in France.


French, English


Faculty member of the IAPP (International Association of Privacy Professionals)
Sits on MedTech Europe’s Data Protection Committee as an external privacy expert

Lawyer Rankings

Belgium > EU regulatory: Privacy and data protection

(Next Generation Partners)

Olivier ProustFieldfisher

Fieldfisher advises on EU-wide and specific national data protection legislation and regulatory compliance issues for its global client base, including GDPR compliance and internal data policies, alongside representing clients before regulatory authorities in cases relating to non-compliance accusations. Alongside enforcement actions, other areas of strength for the practice include data breach notification and response, international data transfers, and issues arising from direct marketing and adtech. The practice is led by Olivier Proust, who advises on global compliance policies for major clients, alongside Tim Van Canneyt, who has a focus on digital technologies and services. Associate Sixtine Crouzet is highly praised by clients for her work on GDPR compliance, cookies, and adtech.

Belgium > Industry focus: IT and telecoms

Working collaboratively across the technology, outsourcing and privacy, and IP departments, Fieldfisher‘s ‘expert, business-oriented’ team is noted for its far-reaching capabilities in outsourcing, procurement, cloud computing, e-commerce and IT-sector disputes. Contractual reviews and e-privacy issues are further core competencies. Practice co-head Tim Van Canneyt is a specialist in data protection and e-commerce, with considerable experience advising clients from the TMT, pharmaceutical, and financial services sectors. Fellow practice head Stijn Debaene is an intellectual property lawyer who focuses his practice on the media and telecoms industries. Olivier Proust‘s expertise encompasses cybersecurity law, global privacy compliance and associated regulatory investigations.