Dian advises and represents companies, institutions and individuals involved as defendants, witnesses or victims in white collar cases. His experience ranges from high profile fraud cases, national and international corruption cases, health & safety investigations to insider trading. He assists companies and institutions in conducting internal investigations into fraud or corruption concerns and advises on bribery and corruption compliance issues.
Dian is endowed professor in Criminal Defence at Maastricht University and is recognized domestically and abroad as a leading specialist in the Netherlands for white collar and business crime defence.
Dian graduated in 1993 from the University of Groningen with degrees in Criminal Law and Company Law. He then worked as a lecturer and researcher at the same university. After completing his doctorate in 1999, he joined Sjöcrona • van Stigt in The Hague. In 2006 he joined CMS in Utrecht, where he led the corporate criminal defence team. He started Solitt in 2016 and joined JahaeRaymakers as a partner in 2019..
Dian is a member of the Dutch Association of Criminal Defence Attorneys (NVSA) and of the European Criminal Bar Association (ECBA). He is a member of the Ministry of Justice’s Advisory Committee on the modernisation of the Dutch Code of Criminal Procedure. From 2010 to 2015 he was one of the founders and the first chairman of the Association of Supreme Court Advocates in Criminal Cases (VCAS) and today he is still a member of the Advisory Committee of the VCAS. Dian is a regular lecturer and speaker on criminal law related matters, both in the Netherlands and abroad.
- Endowed professor
- Member of the European Criminal Bar Association (ECBA)
- Member of the Advisory Committee on the Modernisation of the Dutch Code of Criminal Procedure
- Co-founder and former president of the Association of Criminal Defence Lawyers at the Dutch Supreme Court (VCAS)