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David Brynmor Thomas wears a blue suit and smiles pleasantly

David Brynmor Thomas KC

International Commercial
Arbitrator and Mediator

David Brynmor Thomas KC is an English King’s Counsel renowned for his expertise in international commercial arbitration and mediation with experience in over 30 jurisdictions. He sits exclusively as an arbitrator and a CEDR-accredited mediator.  This follows a 30‑year career that began as a partner in a City of London solicitor’s firm and later as a barrister. 

David Brynmor Thomas KC is an English King’s Counsel renowned for his expertise in international commercial arbitration and mediation with experience in over 30 jurisdictions. He sits exclusively as an arbitrator and a CEDR-accredited mediator.  This follows a 30‑year career that began as a partner in a City of London solicitor’s firm and later as a barrister. 

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David has been appointed in more than 80 arbitrations.  This includes as sole, party-appointed or presiding arbitrator in ad hoc and institutional commercial arbitrations, with experience as counsel and arbitrator under the rules of the: American Arbitration Association (AAA), Dubai International Arbitration Centre (DIAC), International Chamber of Commerce (ICC), International Center for Dispute Resolution (ICDR), London Court of International Arbitration (LCIA), Singapore International Arbitration Centre (SIAC), Stockholm Chamber of Commerce (SCC), Saudi Centre for Commercial Arbitration (SCCA), and Swiss Arbitration Association (SAA).  

 

He has been appointed as an Emergency Arbitrator by the International Center for Dispute Resolution (ICDR), International Chamber of Commerce (ICC) and Singapore International Arbitration (SIAC). 

 

His scientific background—originally trained in medicine—gives him confidence in handling technically complex matters, including those that involve advanced statistics, organic and inorganic chemistry, microbiology, pharmacology, biotechnology, and metallurgy. 

David specialises in the conduct and resolution of complex commercial disputes, encompassing a wide range of industry sectors:

  • Complex and high value construction and engineering projects;

  • Matters arising under EPC and other contracts for the execution of complex construction and engineering projects; contractor and sub-contractor chains; 

  • PSAs, JOAs, and similar arrangements;

  • Disputes in professional partnerships, joint ventures and shareholders' agreements;

  • Power generation and energy-related issues;

  • Renewable energy, including wind and solar farms;

  • Water and desalination plants;

  • Waste disposal;

  • Transportation, including rail, aviation and highways;

  • Oil refineries;

  • Dams;

  • Shipbuilding;

  • Oil and gas and mining;

  • Defence;

  • Bonds, guarantees, pensions and other financial instruments;

  • Insurance;

  • Technology including intellectual property rights;

  • He has also advised on issues arising from: sanctions (in particular under United Kingdom and EU sanctions regimes); the drafting and amendment of industry-wide dispute resolution provisions; and the ability of Governments to sue on behalf of their citizens for alleged mass torts.  

David is a CEDR-accredited mediator who has mediated commercial, insurance and construction cases. He is a British citizen. His practice management is delivered through Newmans Row.

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