Olivier (O.R.) baron van Hardenbroek van Ammerstol


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Olivier is a lawyer since 1994. In 2010 he joined Delissen Martens as a partner. Olivier is a specialized litigator with a focus on commercial law, intellectual property and informatics law.
Corporate Livewire awarded Olivier as Excellence in Litigation in the Legal Awards 2015.


  • Mediation, CVC Haarlem, 2007
  • University of Leiden, 1993
  • Université de Poitiers, 1991- 1992 

Professional Associations

  • Dutch Association of Debt-Collection Lawyers (Vereniging Incasso Advocaten – VIA)
  • candidate for membership in the Netherlands Association of Computer Lawyers (Vereniging Informaticarecht Advocaten – VIRA)
  • Dutch Association of Litigation (NVvP)
  • Union Internationale des Avocats (UIA)


English, French, Dutch