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Lawyers profile | France 2025: Competition/European Law, TMT: Telecommunications
Sylvain Justier
Ranked in 2 Practice Areas
4

Band 4

Competition/European Law

France

14 Years Ranked

Spotlight

TMT: Telecommunications

France

13 Years Ranked

Ranked in Guides
Europe 2024

About

Provided by Sylvain Justier

France

Practice Areas

Sylvain Justier has wide experience in competition law and handles numerous antitrust cases before the competition authorities and national courts. He provides a presence on the occasion of dawn raids and contests such operations. He represents applicant and defending businesses in cartel and abuse of dominant position cases, indemnities-based litigation associated with anti-competitive practices (having to date been involved in ten sets of private enfoncement cases in which sums of between several million and hundreds of millions of Euros were at stake). He also becomes involved in merger control, restrictive competitive practice and unfair competition cases.

In addition, he is a recognised expert in a number of regulated sectors, in particular the telecoms, energy and rail transport sectors. In addition to antitrust cases handled within these sectors, he becomes involved in all the problem regulatory issues his clients come up against and assists them with these, especially in the context of penalty proceedings or proceedings for handling disputes being heard before sectoral regulatory bodies (having been involved in numerous proceedings before the ARCEP – French Telecom – and ART - French Rail- regulatory bodies in particular).

Chambers Review

Provided by Chambers

Chambers France

Competition/European Law - France

4
Band 4
Individual Editorial

Sylvain Justier is recognised for his expertise in handling investigations into alleged cartels and other anti-competitive practices, follow-on damages litigation and merger control cases.

Editorial individuel

Sylvain Justier est reconnu pour son expertise dans le traitement des enquêtes sur des ententes et autres pratiques anticoncurrentielles, des contentieux de réclamations de dommages et de contrôle des concentrations.

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TMT: Telecommunications - France

Spotlight
Individual Editorial

Sylvain Justier of Magenta Société d'Avocats draws on his expertise in competition law to offer telecoms companies advice on litigation related to antitrust investigations. He also assists clients with regulatory mandates.

Editorial individuel

Sylvain Justier de Magenta Société d’Avocats s’appuie sur son expertise en droit de la concurrence pour conseiller les entreprises de télécommunications dans le cadre de contentieux liés aux enquêtes antitrust. Il assiste également les clients dans le cadre de mandats réglementaires.

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Strengths

Provided by Chambers

Sylvain Justier is an excellent lawyer, who is conscientious, meticulous and responsive.

Competition/European Law respondent
Chambers France

Sylvain Justier matches the ethos of our company. He is good; we have enjoyed our collaboration so far.

Competition/European Law respondent
Chambers France

Sylvain Justier is very pragmatic and fully understands our needs. He is very aware of the market and has good expertise. I am very satisfied.

Competition/European Law respondent
Chambers France

Sylvain Justier est un excellent avocat, consciencieux, méticuleux et réactif.

Competition/European Law respondent
Chambers France

Sylvain Justier est très pragmatique et comprend parfaitement nos besoins. Il connaît très bien le marché et possède une bonne expertise. Je suis très satisfait.

Competition/European Law respondent
Chambers France

Sylvain Justier correspond à la philosophie de notre entreprise. Il est fort; Nous avons apprécié notre collaboration jusqu’à présent.

Competition/European Law respondent
Chambers France

Sylvain Justier shows mastery of his subject, responsiveness, inventiveness and market experience.

TMT: Telecommunications respondent
Chambers France

Sylvain Justier is a leader in the management of complex cases.

TMT: Telecommunications respondent
Chambers France

Sylvain Justier is responsive, even in case of emergencies and unforeseen events. The subjects he deals with are very complex from a technical and operational point of view.

TMT: Telecommunications respondent
Chambers France

Sylvian Justier is very reactive and responds very quickly. He knows our issues very well.

TMT: Telecommunications respondent
Chambers France

Sylvain Justier fait preuve d’une maîtrise de son sujet, d’une réactivité, d’une inventivité et d’une expérience du marché.

TMT: Telecommunications respondent
Chambers France

Sylvian Justier est très réactif et répond très rapidement. Il connaît très bien nos enjeux.

TMT: Telecommunications respondent
Chambers France

Sylvain Justier est un leader dans la gestion des dossiers complexes.

TMT: Telecommunications respondent
Chambers France

Sylvain Justier est réactif, même en cas d’urgence et d’imprévus. Les sujets qu’il traite sont très complexes d’un point de vue technique et opérationnel.

TMT: Telecommunications respondent
Chambers France

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