Jeroen studied law at the University of Amsterdam and the University of Michigan, graduating cum laude. In 2022, he completed the Grotius specialization course in Computer Law (cum laude), and in 2023, he finished the specialization course in Cybercrime & Cybersecurity at the Leiden Law Academy.


During his studies, Jeroen worked as a repetitor of European legal history, gained experience at a law firm in The Hague, and learned (website) programming. After obtaining his master’s degree, he worked for several years as an IT lawyer within the government. In 2018, he joined De Clercq’s technology team.

Daily practice

On a daily basis, Jeroen advises and litigates in the field of IT law. For instance, he provides counsel on transactions for cloud services (SaaS, PaaS, IaaS), implementation of ERP systems, or development of custom software. With extensive experience in the resolution of IT disputes, he is adept in mediation, arbitration, and proceedings before public courts. Jeroen is also frequently called upon in the aftermath of large cyber-attacks or other cyber incidents, such as ransomware attacks, DDoS attacks, CEO fraud, or theft of trade secrets.

Selected cases

Lead counsel transactions Google Cloud and AWS (IaaS, PaaS)
Lead counsel for an international organization in multi-million euro transactions for the use of Google Cloud and AWS.

 Lead counsel transaction learning management platform (PaaS, SaaS)
Lead counsel for an e-learning provider in a transaction for the use of a learning management platform.

Lead counsel transactions agile software development
Lead counsel for agile software developer on transactions with various research institutes and technology companies in the United States, Australia, Switzerland and the Netherlands.

Ransomware attack
Counsel for a SaaS provider in the aftermath of a major ransomware attack.

Dispute low-code platform
Counsel for an IT service provider in a dispute with an American provider of a low-code platform about, among other things, the unilateral adjustment of the licensing metrics.

Litigation agile IT project
Lead counsel for an IT company in court proceedings over a failed IT project carried out based on the agile methodology, resulting in the plaintiff’s claim of over 1 million euros being rejected.

Dispute failed ERP-implementation
Counsel on behalf of a leading European retail company in an international (mediation) procedure regarding a failed ERP implementation, resulting in damages from both the software supplier and the implementation partner.

Advice on SaaS and MDR
Advice to SaaS provider on the status of a SaaS solution for hospitals under the Medical Devices Regulation (MDR).

Dispute on-prem software
Lead counsel for an international organization in a dispute with a well-known software vendor regarding additional use of on-premise software in connection with a data center migration.

Support counsel landmark IT arbitration case
Support counsel for a Dutch government organization in a landmark arbitration case regarding a failed IT project, resulting in tens of millions of euros being recovered from the IT supplier for the benefit of the Dutch taxpayer.