In the 2026 edition of Global Arbitration Review’s GAR 100, our arbitration team is once again the only Norwegian practice recognised. This recognition reflects our strength in complex cross-border disputes, where clients highlight our quality, strategic insight, and consistent performance.

Russia’s full-scale invasion of Ukraine in February 2022 changed the European security landscape for the foreseeable future, and recent developments in the Middle East reinforce the picture of a world characterised by heightened geopolitical tensions. The significant role Norway has assumed through plans of major defence procurements necessitates significant contributions from industry and investors – and thus also presents significant opportunities. Wikborg Rein has one of Norway’s leading teams of specialist lawyers dedicated to assisting clients in the defence and security sector, and will be focusing on defence procurement and investment in a series of articles in the coming months.

Global Arbitration Review has unveiled its annual ranking of the world’s leading international arbitration practices – and Wikborg Rein is proud to once again be listed among the selected firms in the GAR 100 for 2025, as the only Norwegian law firm included.

Global Arbitration Review has unveiled its annual ranking of the world’s leading international arbitration practices.

Every year the Norwegian immigration authorities process a number of applications that result in rejection or expulsion. When all rights to appeal have been exhausted, few options remain for a party with limited financial resources to have the decision re-examined. Our pro bono work and collaboration with the Norwegian Organisation for Asylum Seekers (NOAS ), an organisation working to advance asylum seekers' rights in Norway, allows Wikborg Rein to assist in the re-examination of cases often involving court proceedings.

There are a number of ways to make arbitration more attractive and efficient and the inherent flexibility of arbitration provides practitioners with the necessary tools to achieve just this aim without resorting to the development and adoption of further written "guidelines" or "best practices".

Contract Law and Construction

Defence and Security

Dispute Resolution

Transport

Partner, Head of Disputes

Ola is the firm's Head of Disputes and our Industry, Dispute Resolution & Public Sector Group leader. He has substantial experience in litigation and dispute resolution and is admitted to the Supreme Court. 

Ola is recommended and referred to within his practice areas by inter alia Chambers Global, Chambers Europe, Legal 500, International Financial Law Review (IFLR) and Finansavisen. He frequently sits as arbitrator, and has represented for Norway in the ICC Court of International Arbitration in addition to being the chairman of the Arbitration and Dispute Resolution institute of the Oslo Chamber of Commerce and leader of the Norwegian Bar Association's Mediation Committee.

Oslo

Member, Reference Group for the University of Oslo's Dispute Resolution Forum

Member, the ICC Commission on Arbitration and ADR (Norway)

Chairperson, the Norwegian Bar Association's Mediation Committee

Member of the editorial board for Norwegian Business Law Review

Member of the Board, Wikborg Rein

Representative for Norway, ICC International Court of Arbitration

Chairman, The Arbitration and Dispute Resolution Institute of the Oslo Chamber of Commerce

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Leading partners

Leading Individuals

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Ola has substantial experience in litigation and dispute resolution and is admitted to the Supreme Court.

Ola Ø. Nisja

Lecturer in inter alia contract law and civil procedure

Research Assistant and Teaching Assistant

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Recognitions

"Ola Nisja is one of the best dispute lawyers in Norway."

"Ola Nisja is an impressive lawyer who is capable of being in the front seat for a very challenging project."

"Ola Nisja is a very strong litigator, he is persuasive and a great communicator. "