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Bregje Korthals Altes

Bregje is a practical, hands-on, arbitration and litigation specialist with two decades of experience focusing on commercial disputes at the highest level. She thrives on helping clients navigating through high-stake disputes, where there are important interests at stake, whether legal, reputational, commercial and/or financial. She has served as lead counsel and arbitrator in high profile commercial and construction arbitrations, under the ICC, UNCITRAL, NAI, CAM, and other arbitration rules. Recognized in the "Who's Who" in the field of international arbitration for many years, her experience spans a wide range of industries, including oil and gas, mining and minerals, civil engineering, aviation, IT and health tech. Common theme in all her cases is that they all require a thorough understanding – often highly complex – technical issues, in addition to a full command of the facts and legal theories. Based on her interest in the specific dynamics in public-private relationships, Bregje has also gained broad experience in European Procurement Law and in the intense environment of public and parliamentary inquiries.

Before joining Ysquare in 2020, Bregje was partner in the litigation and arbitration group of De Brauw Blackstone Westbroek for many years. She was seconded to Schiphol National Airport and to the Ministry of Foreign Affairs in the Hague. Since 2018 she is a member of the board of the Netherlands Arbitration Institute.


Recent work

  • Assisting a consortium of high-tech companies in their research projects to achieve net-zero emission solutions.
  • Various high-stake arbitrations (institutional and ad-hoc) relating to long-term agreements for the supply and storage of gas.
  • Advising various companies in dealing with the current supply and demand imbalance in the global natural gas markets.
  • Domestic arbitration proceedings on the supply of electricity, and on projects regarding electricity generated from renewables.
  • Helping clients, and counseling executives, in navigating the unique risks of public inquiries, including responding to document production requests and witness interrogations.
  • Legal proceedings against an Italian manufacturer regarding the cancellation of an order for several high-speed trains; various proceedings on the procurement of (self-driving) vehicles.
  • Legal proceedings and tenders regarding military equipment, works and services for security purposes and international peace-keeping missions.
  • Assistance to suppliers of educational materials and classroom supplies.
  • Advising purchasers and suppliers of medical equipment in European tenders, both in legal proceedings before the Dutch courts and in arbitration.
  • ICC arbitration for a leading health technology company regarding the supply and distribution of medical equipment.
  • NAI arbitration on ICT project in the public sector.


Professional background

  • Since 2020

    Ysquare | Attorney-at-law

  • 2000 -2019

    De Brauw Blackstone Westbroek | Attorney-at-law

  • 2005

    Ministry of Foreign Affairs | Legal Counsel, Civil and European Law

Ancillary positions

  • Since 2019

    Port of Rotterdam | Tenderboard Container Exchange Route (CER)

  • Since 2018

    Netherlands Arbitration Institute | Board Member


  • 2012

    Harvard Business School | Leading Professional Service Firms

  • 2000

    Universiteit Leiden | LL.M.


  • NAI and CEPANi joint Colloquium: "Diversity and Inclusion in Arbitration….Do more than the Pledge!", April 2022 (co-author: Sophie Goldman (Tossens Goldman Gonne))
  • Netherlands Chapter of the Government Procurement Review, 2016 (co-author Samuel Vermeulen)
  • Selection vs award criteria; a difference belonging to the past? (‘Onderscheid selectie – versus gunningscriteria passé?‘), Tijdschrift voor Bouwrecht, 2016/8 (issue 1, p.48-51)
  • Case Law Review European Procurement Law (‘Jurisprudentiekroniek Europees Aanbestedingsrecht’), Tijdschrift voor Bouwrecht, 2005 (co-authors E.H. Pijnacker Hordijk en B.M.H.C. Le Haen-de Croon)