Marco de Sousa
Marco is a Senior Associate specialising in international arbitration and public international law.
Marco acts as counsel and advocate in commercial and investment treaty arbitrations in a broad range of industry sectors and jurisdictions. He has particular experience of disputes in the Energy and TMT sectors in Europe, the Middle East, Asia and Africa.
Marco has acted in commercial arbitrations under most major institutional rules and ad hoc arbitrations under the UNCITRAL rules. He advises both investors and states in investment treaty claims, and on issues of Public International Law and Business and Human Rights.
Marco has considerable experience of acting on arbitration-related court proceedings in England & Wales, Singapore and Hong Kong.
Marco is listed as a "key lawyer" in international arbitration and public international law in Legal 500 UK 2021 & 2022.
Recognised by Chambers & Partners (UK-wide) as a "notable practitioner": "Marco is technical and has good judgement. He is also very dedicated to his work."; "He has fantastic legal and practical skills."
Marco joined the firm as a trainee solicitor in 2011, having graduated from UCL with a first in law and from Cambridge University with an LLM in public international law (also first class).
Marco has worked in several offices around the globe, including Dubai, Hong Kong and London. He is currently based in New York.
Experience & expertise
- a US energy major in arbitration proceedings under the UNCITRAL Arbitration Rules relating to a post M&A dispute concerning an offshore oil field in the North Sea
- a leading Chinese oil and gas company in a successful multi-billion dollar commercial fraud claim administered by the Singapore International Arbitration Centre (SIAC) and related set-aside proceedings in the Singapore International Commercial Court
- Malaysian telecoms giant Axiata on its ICSID claim against Nepal over the state's taxation of Axiata's acquisition of the country's largest mobile telecommunications provider
- a Central Asian government and its national oil company in ICSID arbitration proceedings in connection with the investors' withdrawal from a major oil field and related contractual issues
- Vedanta Resources on a claim under the UK-India Bilateral Investment Treaty arising from the imposition of retrospective tax by the Indian tax authorities
- an upstream oil and gas company in LMAA arbitration proceedings in connection with claims for breach of contract and misrepresentation in respect of unpaid day hire for an FPSO
- a Hong Kong company and one of its major shareholders in ICC arbitration proceedings in Singapore arising from an alleged breach of representations and warranties
- a South-East Asian client in its successful claim against a solar power joint venture partner in ICC arbitration in Hong Kong