Maxim Osadchiy is a member of the firm’s International Dispute Resolution Group, resident in London. His practice focuses on international arbitration and complex cross-border disputes, including before the English courts. Mr. Osadchiy is recommended for international arbitration by The Legal 500 UK (2022, 2023, and 2024) and is recognized as a Future Leader in international arbitration by Who’s Who Legal (2024).

Mr. Osadchiy has represented States, corporations and individuals in many significant international proceedings governed by various substantive laws of civil and common law systems and conducted under the rules of all major arbitral institutions. He has been counsel in disputes across a broad range of industry sectors, including oil & gas, mining, construction and pharmaceuticals, often involving parties from the CIS, Asia and the Middle East.

Mr. Osadchiy began his career as a corporate lawyer in the Moscow office of a Magic Circle firm, where he represented domestic and international clients in M&A transactions, primarily in the telecommunications, transport, and retail sectors. He also acquired considerable experience advising clients on PPP and concession projects, some of the largest in Eastern Europe.

Following his decision to focus on international arbitration, he joined the London Court of International Arbitration (LCIA), where he gained unique insights into day-to-day operations of the Institution and in-depth experience with the application of the LCIA Rules. 

Mr. Osadchiy also spent time at a litigation funder. The first private practice secondee to gain that experience, he supported the team during all phases of the funding process, including claim assessment and negotiation of funding terms.

Mr. Osadchiy graduated from the Russian Academy of Justice magna cum laude and obtained an LL.M. from Columbia Law School. He also holds a Master of Laws in Comparative Dispute and International Dispute Resolution from Queen Mary University of London, where he graduated first in his specialisation. Whilst at Queen Mary, he was a research assistant to a prominent arbitrator and academic.

Mr. Osadchiy maintains a keen interest in academia and teaches a popular course on dispute resolution in the energy sector at Queen Mary University of London, led by Professor Dr. Maxi Scherer.

Mr. Osadchiy’s recent publications include “State Courts’ Attitude to Arbitrator Challenge Applications: Rich Tapestry of Arbitrator Bias Standards,” Bahrain Chamber for Dispute Resolution International Arbitration Review (July, 2021); “The Guide to Energy Arbitrations - Third Edition: Compensation in Energy Arbitration,” Global Arbitration Review (January, 2019); “Emergency Relief in Investment Treaty Arbitration: A Word of Caution,” Journal of International Arbitration (2017), and “Winning by Design: An Outsider’s View on Third-Party Funding at Vannin Capital,” Funding in Focus (2017). He also assisted in writing a chapter on provisional measures in a leading commentary on the LCIA Rules (2014).

Prior to joining Debevoise in 2017, Mr. Osadchiy was an associate in the Paris and London offices of a Magic Circle firm. Mr. Osadchiy is a solicitor of England & Wales, a New York attorney, and is qualified to practise law in Russia. He is a native Russian speaker and is fluent in English.


  • Queen Mary School of Law, University of London, 2013, LL.M.
  • Columbia Law School, 2012, LL.M.
  • Russian Academy of Justice, 2009, LL.B.

Bar Admissions

  • New York
  • Solicitor, England & Wales