Oliver van der Haegen
Partner - Attorney at Law

Olivier van der Haegen

Olivier van der Haegen, attorney at law, is Partner and member of the Litigation & Risk Management practice group in our Brussels office. He is experienced in dispute resolution, and focuses on international commercial arbitration. He is also a member of the Restructuring & Insolvency Team and of the France Region Teams.

About Olivier van der Haegen

Olivier regularly acts as counsel in international arbitration proceedings, either ad hoc or under various institutional rules. He also assists clients in court proceedings relating to setting aside, recognition and enforcement of international arbitral awards or foreign judgments (including in investment treaty cases and against Sovereigns).

Aside from his extensive arbitration practice, Olivier handles litigations (including white-collar crime defence) before Belgian courts in the real estate, construction, energy and media industries.

His recent activities include the representation of:

  • Foreign investors in enforcement proceedings of investment-treaty awards (UNCITRAL and ICSID) against sovereign States
  • Two real estate developers in post-M&A Cepani arbitrations (seats in Brussels and Luxembourg)
  • The Belgian credit insurance company and a world leading energy company in ICC arbitration against an African employer (seat in Paris)
  • A Belgian leading infrastructures company acting as contractor in ICC arbitration against a Spanish employer (seat in Paris)    
  • A publisher and media company in civil and criminal proceedings relating to a fraud on the art market

What others say about Olivier

Legal 500 EMEA - Edition 2021 - Dispute Resolution - ranked 'Next Generation Partner'
Who’s Who Legal – Arbitration 2021 - Future Leaders – Partners - ranked as 'Future Leader'

Peers and clients say: "He is a knowledgeable specialist who is very active in the arbitration scene", "Olivier is a persuasive advocate"


  • Brussels Bar (Ordre Français des Avocats), 2010
  • Cepani (the Belgian arbitration institution) 
  • Cepani 40 (Steering Committee)
  • International Arbitration Institute (IAI)


  • LL.M. University of Chicago (USA), 2010
  • LL.M, EU law, College of Europe (Bruges, Belgium), 2009
  • Master in Law, Université Catholique de Louvain (Belgium), 2008
  • Bachelor in Law, Université Saint-Louis (Belgium), 2005


  • French
  • English
  • Dutch

T: +32 2 773 23 52
M: +32 492 22 06 91
E: olivier.van.der.haegen@loyensloeff.com