Margarita Nikki Michael


Thank you for your interest. Before you communicate with one of our attorneys, please note: Any comments our attorneys share with you are general information and not legal advice. No attorney-client relationship will exist between you or your business and O’Melveny or any of its attorneys unless conflicts have been cleared, our management has given its approval, and an engagement letter has been signed. Meanwhile, you agree: we have no duty to advise you or provide you with legal assistance; you will not divulge any confidences or send any confidential or sensitive information to our attorneys (we are not in a position to keep it confidential and might be required to convey it to our clients); and, you may not use this contact to attempt to disqualify O’Melveny from representing other clients adverse to you or your business. By clicking "accept" you acknowledge receipt and agree to all of the terms of this paragraph and our Disclaimer.


Margarita Nikki Michael focuses on international arbitration and business trial and litigation. She has extensive experience working in the United Kingdom and Europe. Margarita is a solicitor advocate with full rights of audience before the English courts and her extensive practice includes cross-border dispute resolution, particularly international arbitration and High Court litigation. Moreover, Margarita is also a CEDR Accredited Mediator.

Margarita’s practice focuses predominantly on the following sectors: energy, joint ventures, project finance, aerospace and defence, pharmaceutical, technological, telecommunications, M&A, investment banking, construction and the airline industry. Notably, she has worked on one of Europe’s largest gas price review arbitrations under the auspices of the ICC. She acts for a diverse range of prominent clients including governments, international organizations, and private clients and often acts as lead counsel on matters.



  • Greek
  • Spanish


Bar Admissions

  • Solicitor Advocate, Supreme Court of England & Wales


  • Nottingham University, LL.B.: Upper Second-Class Honors
  • BPP Law School, LPC: With Distinction

Professional Activities


  • “Brexit International Arbitration Clause is Misunderstood,” Law360 (February 2019)
  • “Third Party Funding: Can costs be awarded against third-party funders by an arbitral tribunal?” Corporate Disputes Magazine (January-March 2018)
  • “Time For Costs Budgeting In International Arbitration?” Law360 (April 2017)
  • “Setting Aside an Award for Serious Irregularity: The Secretary of State for the Home Department v Raytheon Systems Ltd,” International Arbitration Law Review, Vol.18 Issue 2 (2015)
  • “The ‘Good Faith’ Movement: Swimming Against the Tide,” The European and Middle Eastern Arbitration Review (2015)


  • “Mandatory Mediation May Lie Ahead For England And Wales” Law 360 (January 2020)
  • “English Court of Appeal Decision: Limits Scope for Global Antitrust Claims,” O’Melveny & Myers Antitrust and Competition Alert (October 2015)
  • “The ‘Automatic’ Enforcement of ICSID Awards: The Elephant in the Room,” The European and Middle Eastern Arbitration Review (2014)
  • “Degrees of Immunity: A Lesson from the Privy Council,” The European and Middle Eastern Arbitration Review (2013) 

Recognised Contributor

  • “Lost in Translation?: The Independence of Experts under the 2010 IBA Rules,” The European and Middle Eastern Arbitration Review (2011)
  • “Economic Sanctions Laws: The European Union and the United States,” a chapter in the Serious Fraud Office handbook, Serious Economic Crime: A Boardroom Guide to Prevention and Compliance

Mock Arbitrator

  • “International Commercial Arbitration Advocacy,” Mock Arbitration (sitting as Arbitrator), Queen Mary Summer School and K&L Gates (Repeat appointment, July 2015-July 2017)
  • Vienna Pre-Moot, Fox Williams (27 February 2016)


  • International Women’s Day legal event sponsored by AlphaSights, London (March 2019)
  • The Rise of Third Party Funding in English Litigation,” O’Melveny Video Primer (December 2018)
  • “Should successful claimants be awarded their costs of third-party funding?” CDR Autumn Arbitration Symposium 2017, Sofitel Hotel, London St James (September 2017)
  • “Best Practices of International Arbitration,” International Centre for Dispute Resolution Y&I, Belgrade, Serbia (December 2016)
  • “Strategic Choices in International Arbitration,” AIJA 8th Annual Arbitration Conference, New York (October 2016)
  • “A Code of Ethics for Counsel in International Arbitration,” Gonville & Cauis College, Cambridge (March 2016)
  • “Practical Issues in International Arbitration,“ ICC YAF Roundtable, Gonville & Cauis College, Cambridge (March 2016)
  • “ICC YAF meets ICC UK - The Future of International Arbitration,” ICC YAF event, K&L Gates London (December 2015)
  • “Is London a ‘safe’ haven for arbitration?” ICC YAF Conference; “Arbitration vs. Litigation,” internal legal seminar


  • “SIAC proposes ‘ground-breaking’ consolidation protocol,” CDR News (21 December 2017)


  • Committee Secretary, International Arbitration Charity Ball Committee (2017/2018)
  • Chair of the Management Team of the Hellenic Law Association
  • Young International Arbitration Group (YIAG) of the London Court of International Arbitration (LCIA)
  • International Arbitration Charity Ball Committee (2016)
  • Young Singapore International Arbitration Centre of SIAC (YSIAC of SIAC)
  • International Chamber of Commerce Young Arbitrators Forum (ICC YAF)

  • Successfully representing one of the largest natural gas trading companies in Eastern Europe against a leading exporter of natural gas in a high value gas price review arbitration under the auspices of the ICC
  • Representing a Latin American State in a HKIAC arbitration concerning disputes arising out of the purchase of a ship by the navy from a PRC shipbuilding yard
  • Representing a Latin American State in a PRC law claim against a Chinese bank concerning disputes under a performance guarantee
  • Representing a government-owned entity in a shipping dispute under the auspices of the LMAA.
  • Advising on the interpretation of a teaming agreement in relation to a public authority tender for management and development of energy sites with a value of US$8 billion