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Tom De Cordier


CMS DeBacker
Chaussée de La Hulpe 178
1170 Brussels
Languages Dutch, French, English

Before joining CMS Tom worked at Allen & Overy where he started his career in October 2000, was then promoted to senior associate in May 2007 and to counsel in May 2011.

Tom is a seasoned technology lawyer with a strong focus on data privacy law, technology, media and communications law, technology-related IP and life sciences. 

Clients praise him for his commercial acumen and his pragmatic and down-to-earth style.

His practice covers a wide range of advisory, transactional and litigation work in international and domestic matters relating to data privacy, TMC and life sciences.

Tom is ranked tier 1 in Legal 500’s latest shortlist of leading practitioners in EU data protection. Chambers Europe ranks Tom as “Up and coming” in the category Technology, Media & Telecommunications in Belgium. Corporate International Magazine recently recommended Tom as “rising star of the year in Belgium” for telecommunications law.

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"Tom de Cordier advises on cross-border telecoms regulatory matters and data protection. Clients regard him as a 'natural contact person for data protection in Belgium' and describe him as 'hands-on, pragmatic and solution-orientated'."

Chambers Europe, 2018

‘Excellent’ practice head Tom De Cordier ‘provides comprehensive regulatory and business advice’.

Legal 500, 2018

“[Tom De Cordier is] very approachable and clear in what the necessary steps are."

Feedback from a client - Chambers Europe, 2017

Relevant experience

  • From 2012 until 2014 Tom was a member of the European Advisory Board of the IAPP (the International Association of Privacy Professionals)
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  • 1999 - University of Ghent, UGent (Master in law, 1999)
  • 2000 - University of London (LL.M. in Computers & Communications)
  • 2000 - Bar admission (Brussels, Belgium)
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Im­plic­a­tions of a Di­git­al Single Mar­ket
A con­fer­ence re­port
CMS Net­work Shar­ing Study 2016
Shar­ing gath­ers pace


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CMS wins Trends Leg­al Award for "Best Bel­gian Law Firm...
14 Feb 20
Bel­gian DPA pub­lishes new de­tailed guidelines on dir­ect mar­ket­ing
The Bel­gian Data Pro­tec­tion Au­thor­ity (DPA) has just pub­lished its new Re­com­mend­a­tion for the pro­cessing of per­son­al data for dir­ect-mar­ket­ing pur­poses. Avail­able in French and Dutch, this 78-page doc­u­ment...
31 Oct 19
Leg­al pre­ci­sion in pri­vacy, data se­cur­ity & data pro­tec­tion
02 Oct 19
Time to up­date your cook­ie con­sent and policy! CJEU says pre-ticked...
On 1 Oc­to­ber, the Court of Justice of the EU (“CJEU”) rendered its judg­ment (Case C‑673/17) in a case con­cern­ing cook­ie-based trans­par­ency and con­sent. This rul­ing will sig­ni­fic­antly im­pact the...
EU Cy­ber­se­cur­ity Month: When a simple phish­ing click...
31 Jul 19
Us­ing so­cial plug-ins on your web­site? You and the so­cial net­work...
On 29 Ju­ly 2019, the Court of Justice of the EU (“CJEU”) con­firmed that a web­site own­er that has em­bed­ded a third-party so­cial plug-in, such as Face­book’s “Like” but­ton, in­to its web­site may...
CMS Bel­gi­um as­sisted Nor­d­ic Info and XTN with the sale...
31 May 19
First Bel­gian GDPR sanc­tion: DPA fines may­or EUR 2,000
On 28 May 2019, the Bel­gian Data Pro­tec­tion Au­thor­ity (DPA) an­nounced (avail­able in French and Dutch) the im­pos­i­tion of the first Gen­er­al Data Pro­tec­tion Reg­u­la­tion (GDPR) fine in Bel­gi­um. A may­or was...
Septem­ber 2018 News­let­ter
24 May 19
First EU-wide le­gis­la­tion on cy­ber­se­cur­ity has been im­ple­men­ted in...
NIS is here, but what does it mean? Bel­gi­um did not pre­vi­ously have a com­plete ar­sen­al of le­gis­la­tion on the se­cur­ity of net­work and in­form­a­tion sys­tems. The new law aims to fill this gap. While the im­ple­ment­a­tion...
11 Apr 18
Data Law Nav­ig­at­or | Over­view
In­form­a­tion on Data Pro­tec­tion and Cy­ber Se­cur­ity laws...
02 Apr 19
EU Ad­voc­ate Gen­er­al gives In­ter­net cook­ie opin­ion that could im­pact...
Ad­voc­ate Gen­er­al Ma­ciej Szpunar, a seni­or leg­al ad­viser to the EUs Court of Justice (CJEU), de­livered an opin­ion (Case C‑673/17) in a case con­cern­ing the ques­tions: should web­sites ac­tu­ally give users...