Mr Olivier van der Haegen > Loyens & Loeff > Brussels, Belgium > Lawyer Profile

Loyens & Loeff

Work Department

Olivier is Partner in the Loyens & Loeff Litigation & Risk Management Practice Group in Belgium.


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.

Olivier has been named “next generation lawyer” in Dispute Resolution by Legal 500 and a “Future Leader” in international arbitration by Who’s Who Legal (category “non-partner”).


Olivier started his career at the Brussels Bar in 2010. Prior to joining Loyens & Loeff, Olivier has worked as (senior) associate in two other law firms in Brussels.


Olivier works in French, English and Dutch.


He is a member of Cepani (the Belgian arbitration institution) and Cepani 40 Steering Committee.


Olivier holds LL.M. degrees from the University of Chicago (2010) and the College of Europe (Bruges; 2009), and a Master’s degree in Law from the Université Catholique de Louvain (2008, summa cum laude).

Lawyer Rankings

Belgium > Dispute resolution

(Next Generation Partners)

Olivier van der HaegenLoyens & Loeff

Loyens & Loeff‘s team leverages its close ties with the firm’s offices in Luxembourg, Switzerland and the Netherlands and  has a strong track record representing some of the world’s largest companies in business-critical mandates, including multi-jurisdictional class actions and international commercial arbitrations before CEPANI and the ICC. The practice is jointly headed up by two partners: Hakim Boularbah, whose capabilities span civil and commercial litigation and arbitration at national, European, and international levels, and Olivier van der Haegen, a is noted for his work as both counsel and arbitrator for clients in the insurance, aerospace, energy and infrastructure sectors. Maria-Clara Van den Bossche focuses chiefly on class actions, enforcement and public international law, working with leading tech and telecoms companies.