Prof Dr Jos Dumortier > time.lex > Brussels, Belgium > Lawyer Profile

Jos Dumortier photo

Work Department

Information Technology, Privacy & Data Protection.


Partner. Internationally renowned expert in privacy & data protection; IT, software and internet; e-signatures, e-security, e-authentication and identity management; digital and mobile marketing. Author of the Belgian 1992 Data Protection Act at the Belgian Government’s request.


Co-founder of TMT & IP boutique law firm time.lex in 2007. Professor em. of IT and data protection law at the University of Leuven. Founder and Director of the Interdisciplinary Centre for Law and ICT (ICRI) of the University of Leuven. Research Director at iMinds. Together with the Belgian Minister of Justice, the driving force behind the Belgian Cybercrime Centre of Excellence for Training, Research and Education. Formerly head of TMT at Lawfort (2005-2007) and associate at Simont & Simont (now Stibbe) (1981-1992).


Dutch, English, French.


Brussels Bar. +10 years Board member of Computerrecht, the leading Belgian-Dutch journal on IT and data protection law. Board member of the Belgian branch of the Federation of Telecommunications Engineers of the European Union (FITCE) and the European Association for e-Identity and Security (EEMA). Member of the Belgian Telecommunication Users Group (BELTUG).


Information Science (Free University of Brussels, 1983). PhD in Law (1981). Post-graduate studies (University of Nancy, 1974, and University of Heidelberg, 1975). Law degree (University of Leuven, 1973).

Lawyer Rankings

Belgium > Industry focus: IT and telecoms

(Hall of Fame)

Jos Dumortiertime.lex

Boutique IT and media firm time.lex is highlighted for its strength in data IT and data protection regulatory and compliance matters and also handles litigation. The group frequently advises European, national and foreign governments and governmental bodies, and is representing the Belgian Data Protection Authority in high-profile litigation against Facebook. The team has substantial sector expertise and is jointly led by Jos Dumortier, Hans Graux, Geert Somers, Edwin Jacobs, Frederic Debusseré and Ruben Roex.

Belgium > EU regulatory: information technology

(Leading individuals)

Jos Dumortiertime.lex

time.lex‘s ‘responsive‘ team has ‘great knowledge of the EU regulatory framework regarding information technology‘ and provides ‘always hands on, understandable and usable‘ advice. Cybersecurity matters have been prominent in the group’s workload over the past year. Hans Graux and Geert Somers are ‘impressively tech-savvy‘ and ‘solution focused‘; Frederic Debusseré, Jos Dumortier, Ruben Roex and Edwin Jacobs are also key practitioners.

Belgium > EU regulatory: Privacy and data protection

time.lex‘s practice stands out for its ‘great expertise in matters concerning international data transfers and in working with government institutions‘ and is ‘one of the top legal experts in the area of EU data protection law‘, according to a client. Key names in the team include Geert Somers (a ‘good communicator‘); IT and data protection expert Jos Dumortier; the ‘reliable advisorFrederic Debusseré; the ‘responsiveHans Graux; Edwin Jacobs, who is very experienced in fintech matters; and Ruben Roex, who has a ‘very hands-on, pragmatic and no-nonsense approach‘.