The technology and data department at Winston Taylor regularly supports clients through GDPR compliance, international data transfers, and regulatory investigations. The practice is led by Otto Sleeking, who focuses on IT projects and data protection proceedings, including claims and complaints before the Data Protection Authority, and Martijn Loth, who specialises in technology-related contracts and ensuring compliance with data protection law and regulation. Tim de Klerck joined the team in September 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Martijn Loth is the key person to go to for technology regulation. He speaks the same language as my IT team does.’
‘Martijn Loth is a very competent, commercial lawyer. His tech background helps immensely in complex tech cases. A strategic thinker who will de-escalate matters while protecting the position of his clients.'
‘We work closely with Otto Sleeking and Martijn Loth. Both are absolutely great lawyers.’
‘Service-minded.'
‘Very knowledgeable. Also very practical.’
‘Otto Sleeking was prompt in responding and he always maintained professionalism.'
Key clients
- ABN AMRO
- Amdax
- Bunge Loders Croklaan
- Coinmerce
- Hiya
- SpaceX
- Vinted
- WCC
- Zeekr
- Astrata
- Atradius
- BYD
Work highlights
Advising a major manufacturer of electric vehicles on implementing a multi-level data sharing arrangement for all their on-board and cloud systems in the context of the Data Act and leading the implementation of the AI Act.
Successfully advised leading crypto asset service providers in achieving cybersecurity (DORA) compliance (including drafting and implementing their policy house) in the context of their MiCAR licence application.
Successfully defended one of the largest employment services in a supervisory investigation by the Dutch DPA.
Practice head
Otto Sleeking; Martijn Loth
Other key lawyers
Sharif Ibrahim; Sasun Sepoyan; Tim de Klerck