Constantine, one of the founding partners of Three Crowns, has appeared as counsel in some of the largest international arbitrations of the last two decades.

Constantine’s experience includes:

  • Securing a final award for ConocoPhillips against Venezuela for an amount close to $9 billion in an ICSID arbitration
  • Obtaining a final award, in an ad hoc arbitration, for a consortium of clients against the Nigerian National Petroleum Company in excess of $2 billion
  • Securing an award against the Kurdistan Regional Government for $1.98 billion in an LCIA arbitration
  • Appearing for the ICC International Court of Arbitration before the UK Supreme Court in relation to the challenge of an arbitrator in the celebrated case of Halliburton v Chubb (click here to view appearance)
  • Acting for Elliott Associates against the Republic of Korea in a claim brought under the Korea US Free Trade Agreement
  • Acting for the Republic of Kenya in ICSID proceedings brought against it by World Duty Free Company Ltd claiming $500 million in respect of allegedly expropriated duty-free concessions at Kenya’s international airports

In addition to his counsel work, Constantine appears regularly as arbitrator, including in disputes that involve States and State entities. He has experience acting as Chairman or Sole Arbitrator in cases under the ICC Rules, the LCIA Rules, the SCC Rules, and the UNCITRAL Rules.

Constantine is recognised internationally in all major directories and publications at the top of the arbitration market. Over the last decade, he has been named each year in the Top 20 a “Global Elite Thought Leaders” by Who’s Who Legal, which describes him as “‘the leading arbitration lawyer in London”, “exquisite as an advocate”, and “a leader of his generation”. Chambers recognises him as one of only two “Star Individuals” in international arbitration in London, with a market source saying he is “seen as one of the go-to people in the world for a party who is involved in a large and complex arbitration”. He is also listed in the “Hall of Fame” for international arbitration in The Legal 500.

Constantine is a co-author of the fourth, fifth, and sixth editions of the leading textbook on international arbitration, Redfern and Hunter on International Arbitration. He is a Director of the LCIA Board.

Constantine is a solicitor-advocate (Higher Courts Civil) and was appointed Queen’s Counsel in 2014. He was educated at King’s College, London and Cambridge University.