Costas has been a partner in a major international City law firm since 2002 and is highly experienced in insurance and reinsurance disputes, commercial litigation, and international arbitration. 

He is also a CEDR accredited mediator and has acted as counsel to clients in numerous mediations. 

He is regularly commended in leading legal guides nationally and internationally, with comments such as  “ a great person and an even better attorney…great at cross-border work.. always willing to drop everything for a time sensitive project.. excellent experience in International Arbitration and excels in disputes across the US, Europe and the MENA region “ (Legal 500, 2021).  

He is named as a leading insurance and reinsurance lawyer in the Media Group Guide to the World’s Leading Lawyers and in the International Who’s Who of Insurance and Reinsurance Lawyers

Costas has led Investor/State ICSID arbitrations, as well as those under ad hoc, trade and institutional arbitrations (e.g. ARIAS, UNCITRAL, ICSID, ICC, LCIA and LMAA). He is an Associate Member of the Chartered Institute of Arbitrators and a member of the ICC UK’s Arbitration and ADR Committee with other leading International Arbitration lawyers.  He also advises on all aspects of litigation funding.

Costas is qualified in England and Wales.