Mark McNeill is a leading barrister and advocate specialising in international commercial and investment treaty arbitration. Mark has acted as lead counsel in dozens of high-value commercial disputes under US, English, French and numerous other governing laws. His experience spans complex matters involving supply agreements, joint ventures, IP licensing, corporate and shareholder disputes, banking and finance, construction and engineering contracts, mining, and insurance and reinsurance. Notable representations include Areva SAS in its long-running dispute against Finnish utility TVO over nuclear power plant construction, and United Group in an arbitration against the Republic of Serbia over actions taken against UG’s telecoms subsidiary. Mark has specialized in international arbitration for 27 years, acting as counsel or arbitrator in approximately 100 disputes across Western and Eastern Europe, Asia, the Middle East, and North and South America. His practice encompasses both commercial and investment treaty arbitrations under all major arbitral institutions and rules. He has been involved in numerous high-value, landmark cases and regularly sits as arbitrator. Mark's unique background includes four years representing the United States in investment treaty disputes at the State Department, giving him rare insight from both private practice and sovereign perspectives.