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Jean-Sébastien Mariez
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France 2025
Lawyers profile | France 2025: TMT: Information Technology
Jean-Sébastien Mariez
Ranked in 1 Practice Areas
4

Band 4

TMT: Information Technology

France

1 Years Ranked

About

Provided by Jean-Sébastien Mariez

France

Practice Areas

Jean-Sébastien Mariez assists key players in the digital economy by protecting their innovation and securing their business activities. His practice focuses on ICT service activities, Media, Gaming, Luxury and Consumer goods. Thanks to his experience as in-house counsel at a large US-based software company and Internet service provider, Jean-Sébastien has an excellent understanding of product lifecycles and business models that he puts to good use as a business oriented advisor and a litigator.

Jean-Sébastien is a contributor to the “Code du Numérique” (Lexis Nexis).

TMT

Information Technology 

Intellectual Property

Data Protection

Litigation

Dispute Resolution

Regulatory: Government & Public Affairs (Europe-wide)

Chambers Review

Provided by Chambers

Chambers France

TMT: Information Technology - France

4
Band 4
Individual Editorial

Jean-Sébastien Mariez represents clients in IT and data protection cases. He assists clients with GDPR compliance mandates and the AI Act. He represents IT service providers as well as healthcare and entertainment companies.

Editorial individuel

Jean-Sébastien Mariez représente des clients dans des dossiers d’informatique et de protection des données. Il assiste les clients dans le cadre des mandats de conformité RGPD et à l’AI Act. Il représente des prestataires informatiques ainsi que des entreprises du secteur de la santé et du divertissement.

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Strengths

Provided by Chambers

Jean-Sébastien Mariez is very responsive, even for matters that require strong knowledge and expertise in the latest tech trends.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez answers very well and is able to estimate our urgent needs.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez is a trustworthy person who has a detailed knowledge of the subjects, but also a strategic sense in the way he approaches cases while respecting the interests of the client.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez has a great understanding of the gaming sector which helps to navigate technical and complex topics.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez est très réactif, même pour les dossiers qui nécessitent une solide connaissance et une expertise des dernières tendances technologiques.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez a une grande compréhension du secteur du jeu vidéo qui l’aide à naviguer sur des sujets techniques et complexes.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez répond clairement et peut estimer nos besoins urgents.

TMT: Information Technology respondent
Chambers France

Jean-Sébastien Mariez est une personne de confiance qui a une connaissance fine, mais aussi un sens stratégique dans la façon dont il aborde les dossiers tout en respectant les intérêts du client.

TMT: Information Technology respondent
Chambers France

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TMT: Information Technology
Jean-Sébastien Mariez
4
Jean-Sébastien Mariez
4
Band 4
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