Dimitrios Katsikis

Dimitrios Katsikis is Counsel at A&O Shearman in Singapore, focusing on Arbitration and Mediation. He represents companies, State-owned entities and governments in international commercial and investment treaty arbitrations, as well as in pre- and post-arbitration negotiations, strategy and claims management.

He represents clients in the power, oil & gas, energy, construction and mining industries, as well as in disputes relating to mergers & acquisitions. He has worked in arbitrations under major arbitration rules such as ICC, ICSID, LCIA, LMAA, SIAC, UNCITRAL and CRCICA, as well as on arbitration-related litigation before the English, French, Swiss, Dutch, Indonesian and Pakistan courts. Alongside his work as counsel, he has experience sitting as arbitrator.

His representative matters include acting for the majority shareholders in the former Yukos Oil Company as Claimants in three UNCITRAL arbitrations in The Hague against the Russian Federation, where the Tribunal ordered the Russian Federation to pay over US$50 billion in damages — the largest award ever rendered by an arbitral tribunal; acting for Huawei Technologies Co., Ltd. as Claimant in an ICSID arbitration against the Kingdom of Sweden (ICSID Case No. ARB/22/2) concerning Sweden’s ban of Huawei’s equipment from 5G infrastructure; acting for the Arab Republic of Egypt as Respondent in two investment arbitrations concerning alleged violations under the Egypt-Poland, Egypt-U.S. and Egypt-Germany bilateral investment treaties relating to a long-term natural gas supply contract, with around US$2 billion claimed; and acting for two Egyptian State-owned entities in a US$6 billion ICC arbitration in Geneva and a US$4 billion CRCICA arbitration in Cairo arising out of a long-term gas supply contract relating to the export of Egyptian gas to Israel.

He is the Co-Chair of the ICC’s Empowerment Committee in Singapore, having been an ICC YAAF Representative for South Asia, and is a member of the Advisory Board of the Young Arbitration Group of CIICA, Pakistan’s first international arbitration organisation. He is qualified in England & Wales and New York, and speaks English, French and Greek.

Dimitrios is recognised as a Leading Associate for International Arbitration by Legal 500 Asia Pacific, Singapore 2026, was shortlisted for Associate of the Year (International Arbitration) by Legal 500 Singapore in 2026, and was named an ALB Asia Rising Star (Singapore) in 2026. He holds an LL.B. from the University of London (2009), a Legal Practice Course from BPP Holborn (2010), and a Bachelor of Civil Law from Oxford University (2011). He was admitted as an Attorney-at-Law in New York in 2014 and as a Solicitor of England & Wales in 2016.