Arbitration
We handle some of the world’s most demanding international commercial and investor state arbitrations, delivering proven success in complex, high stakes disputes and earning recognition as a GAR Top 30 firm.
Pinsent Masons is known for its work on large, complex international arbitrations, particularly in the energy and infrastructure sectors, and for acting on politically sensitive commercial and investment treaty disputes. Our team brings together sector expertise, international arbitration experience and a genuinely global platform to support clients in their most critical disputes.
Clients describing us as "‘the best of the best - a team that is at the absolute top of its game and a market-leader in international arbitration."
Out-Law / Your daily need to know
Our latest work
Our advisers act on domestic and international projects of all shapes and sizes, working with many of the leading names across this diverse sector. Browse our experience below, or use the filters to look-up recent work in particular geographies and legal disciplines.
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Eurohold Bulgaria AD and Euroins Insurance Group AD
Representing Eurohold Bulgaria AD and its insurance subsidiary Euroins Insurance Group in treaty claims against Romania under an intra EU BIT. The case is the first to challenge the termination of the sunset clause following the Termination Agreement for all intra EU BITs and is closely watched by the international arbitration community.
- Cross-border
- Financial Services
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ArcelorMittal S.A.
Representing ArcelorMittal S.A. in an investor-State arbitration against the Italian Republic. The dispute concerns a series of unlawful measures adopted by Italy in violation of the Energy Charter Treaty (the “ECT”). The case was registered by the ICSID Secretary-General on 25 July 2025 under ICSID Case No. ARB/25/34.
- Italy and United Kingdom
- Technology, Science & Industry
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Client confidential
Advising on two complex English law governed HKIAC arbitration proceedings arising from the construction of a large-scale ethane gas processing facility in Russia. With inter-office/continent collaboration, we are progressing both arbitrations whilst also having obtained two permanent anti-suit injunctions, one permanent anti-enforcement and one interim anti-enforcement injunction in the Hong Kong Courts.
- Germany and United Kingdom
- Energy & Natural Resources
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Client confidential
Acting for a Middle Eastern energy company in enforcing one of the largest energy awards issued in recent years. The team advises on multi jurisdictional strategy across the Middle East and Europe, navigating issues relating to sanctions, sovereign immunity, public policy defences and asset tracing.
- Iran and Qatar
- Energy & Natural Resources
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Client confidential
Representing an Indian automotive parts manufacturer in a Section 68 challenge to an arbitral award initiated before the Commercial Court in London.
- United Arab Emirates; United Kingdom
- Technology, Science & Industry
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Client confidential
Advising an independent power producer in relation to a dispute against its EPC contractor arising from the construction and delivery of rooftop photovoltaic solar systems across three sites in Thailand and the termination of the EPC contracts. SIAC arbitration seated in Singapore.
- Thailand
- Energy & Natural Resources
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Client confidential
Advising an international contractor JV in respect of complex and technical claims in the value of SAR 2.4 billion (USD 640 million) relating to a SAR 6 billion tunnelling project.
- Saudi Arabia
- Infrastructure
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Client confidential
Advising an international main contractor in relation to an ICC arbitration AED 30 million raised against it by its subcontractor in relation to claims and counterclaims relating to two substation projects.
- United Arab Emirates
- Energy & Natural Resources
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Client confidential
Advising an international contractor in relation to claims raised against it in the Saudi Courts in the value of SAR 1.2billion (USD 320 million) relating to defective construction of 400 villas in Saudi Arabia.
- Saudi Arabia
- Infrastructure
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Client confidential
Represented a regional MEP contractor in DIAC arbitration in relation to MEP works on a major hotel development in Dubai.
- United Arab Emirates
- Infrastructure
Our expertise, at your disposal
With over 490 partners and 3000 people around the world, we are well-placed to support you across a full range of legal and advisory services.
Pamela McDonald
Partner, Head of Office, Doha, Co-head of International Arbitration
EmailFrom her base in Qatar, Pamela advises Middle Eastern clients in the infrastructure and energy sectors, and specialises in international arbitration.
Sylvia Tonova
Partner, Co-Head of International Arbitration, Head of Investment Arbitration and Public International Law
EmailSylvia assists companies, states and state-owned entities in the resolution of complex, high-stakes and politically sensitive disputes arising under contracts, bilateral investment treaties (BITs) or multilateral treaties such as the Energy Charter Treaty. Sylvia has acted as both counsel and arbitrator and has extensive experience in the energy, mining, infrastructure and telecommunications industries.
Partner
EmailNeal specialises in the avoidance and resolution of disputes relating to major infrastructure and energy projects across the UK.
Partner, Head of Office, Sydney
EmailSadie has a wide range of experience in advising clients in the construction and engineering, energy and oil and gas sectors and advises clients on contractual and commercial matters involving complex, large-scale projects in Australia and Asia Pacific more generally.
Partner
EmailDescribed by Legal 500 as a “superstar” and recognised as a “Future Leader” in Lexology (formerly Who’s Who Legal), Wee Jian is an international disputes lawyer, specialising in multi-jurisdictional construction, infrastructure, and energy arbitration and litigation.
Partner
EmailRichard Ashmore is an international construction lawyer with almost 20 years' experience advising clients on construction and infrastructure disputes.
Partner
EmailFaisal heads up the Civil Law Dispute Resolution Practice for the Middle East region and has extensive experience in both litigating and arbitrating construction and commercial disputes across this region.
Partner
EmailAttila is a senior member of the Dispute Resolution team and focuses on complex litigation matters in the field of cross-border insolvency, commercial and corporate law.
Partner
EmailZoe is a Criminal Regulatory Law specialist who advises on Health and Safety, Food Safety and Product Safety
Latest press releases
Show me all press releasesOrbital launches Scots Law workflows for Commercial Real Estate following pilot with Pinsent Masons
Orbital has built specific workflows for Scottish commercial real estate work, built around Scots Law and Scottish real estate practice
Pinsent Masons advises on £230m plus Penta Real Estate and Staycity Group London aparthotel joint venture
Multinational law firm Pinsent Masons has advised Penta Real Estate on its investment into a landmark £230 million-plus joint venture with Staycity Group and advised the joint venture on the financing arrangements for the development, which will deliver a 350-room Wilde aparthotel in the heart of London's Farringdon district.
Pinsent Masons advises industrial manufacturers PROXMUS and Promus on the sale of their businesses to CGH Group
Multinational law firm Pinsent Masons has advised manufacturing companies PROXMUS and Promus on the sale of their businesses to CGH Innovation, one of Europe’s leading manufacturers of steel tanks and a portfolio company of H.I.G. Capital, a global private equity firm headquartered in Miami.
Sylvia Tonova
Partner, Co-Head of International Arbitration, Head of Investment Arbitration and Public International Law