"Gabriel Mulero Clas sitting at a desk.

Gabriel deals with large international construction and engineering projects and disputes. He is bilingual, speaking both Spanish and English, and is proficient in French.

Gabriel has experience in complex multi-million-dollar claims, dispute adjudication board and ICC, SIAC & other arbitration proceedings as an advisor, representative and advocate. He has acted for governments and ministries, international contractors, consultants, development banks and aid agencies. This work has included construction projects such as power plants, airports, seaports, tunnels, roads, railways and hotels. This work has spanned Europe, South Asia, West & East Africa, Central America, the Caribbean and the UAE in FIDIC and other forms of contract. His experience includes assisting on matters concerning the widely reported case of Obrascon Huarte Lain SA v Her Majesty’s Attorney General for Gibraltar in both the Technology and Construction Court and the Court of Appeal of England and Wales.

Gabriel holds a Master of Laws (Merit) from University College London, a Juris Doctor (Cum Laude) from the University of Puerto Rico and two Bachelor of Arts in Economics and International Relations (Cum Laude) from Boston University. He is an attorney at law from the US jurisdiction of Puerto Rico with working experience in English, Spanish and French.

Before moving to London for his Master of Laws in 2010, Gabriel developed his own legal practice in Puerto Rico where he advised clients on contracts, labour issues and family disputes including an agency of the Government of Puerto Rico. His prior experience also includes multi-million-pound banking and financing projects as paralegal in Linklaters from where he was seconded to ABN AMRO Bank London to advise on contractual matters.

Recent work
  • Airports - Mediterranean: Acting for the Government of Gibraltar in litigation against a contractor in a £30 million contract.
  • Buildings - Mediterranean: Acting for the contractor in arbitration on a multimillion-euro refurbishment of a five star hotel.
  • Dredging/Ports - Caribbean: Advising the employer on claims on the construction of a cruise ship pier.
  • Dams - Africa: Counsel for the employer on DABs in excess of €900 million on a large hydroelectric power project.
  • Railways - Romania: Counsel for the contractor on DABs and an ICC arbitration on two high-speed railway projects priced in excess of €160 million.
  • Railways - UAE: Advising the contractor on dispute avoidance and resolution on a bespoke turnkey contract for the construction of a US$ 1 billion railway.
  • Roads - The Balkans: Counsel for the subcontractor in an ICC arbitration against a contractor on a multi-million-euro motorway project.
  • Tunnels - Northern Europe: Advising the employer on a multi-billion-euro project for the construction of a tunnel.
  • Urban - Caucasus: Advising a consultant joint venture on claims concerning the design and construction supervision of an urban upgrading project.

Recommended as a key lawyer in contentious construction in Legal 500 UK 2023.


"Chapter 20 – Employer’s and Contractor’s Claims" in book FIDIC 2017 – A Practical Legal Guide (2020)

Articles in Construction Law at Large by Corbett & Co, including:

  • "FIDIC Changes in Legislation and Covid-19: Compelled by Law or Just Doing Your Job?" (2021)
  • "Del tiempo y dinero en contratos FIDIC durante Covid-19" (2020)
  • "Unintended Consequences of the FIDIC 2017 Clause 20.1 Claims Classification System" (2018)
  • "The Risk of Relying on the Obrascon Case’s Ruling on Sub-Clause 20.1 Claim Notices" (2017)
  • "SCL’s New Take on the Delay and Disruption Protocol" (2016)
Did you know

Gabriel has lived in the Caribbean, North and South America and Europe, loves the sea and cooks a mean steak.

International construction knowledge hub

Our international construction team provides useful analysis, commentary and updates on everything FIDIC related from arbitration to bonds. The hub is searchable by book colour and specific clauses in the FIDIC 1999 and 2017 contracts.



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