George Martsekis

George Martsekis is a Senior Associate in our Litigation & Arbitration practice. He has seven years’ experience across complex cross border disputes. His practice spans high value litigation and international commercial and investment arbitrations under leading rules (including ICC, LCIA and ICSID), with a sector focus on energy, construction, M&A, and financial services. His experience also includes drafting and negotiating cross-border distribution and franchise agreements, as well as conducting legal due diligence on significant M&A transactions, bringing commercially grounded insight to contentious mandates. Before joining Zepos & Yannopoulos, George trained and practiced with leading law firms in New York, Washington, D.C., London, Copenhagen, and Athens. He holds a PhD (summa cum laude) in International Arbitration and was a Visiting Scholar at Columbia Law School during his doctoral studies. George has published extensively on international arbitration, including the monograph Good Faith in International Commercial Arbitration (Routledge, 2025). He is admitted to the Athens Bar (Court of Appeals) since 2019 and joined the firm in January 2026. · Zepos & Yannopoulos