For more than three decades, Mr. Hanessian has acted as counsel and arbitrator in a wide range of commercial and treaty disputes arising under the laws of many common and civil law countries and public international law. Prior to June 2020, he was a partner at Baker McKenzie, where he practiced for 33 years, and served as global co-head of the firm’s International Arbitration Practice, head of its International Arbitration Practice in North America and head of its New York office Litigation Department.