Christina Hioureas is a partner, Global Co-Chair of the firm's International Litigation & Arbitration Department, and Chair of the United Nations practice group. Hioureas represents States and private and State-owned entities in investment and commercial arbitration disputes and public international law matters and advises States on matters before the UN. She also serves as arbitrator.

Described as a “a skilled investigator, case strategist, and disciplined team leader,” Hioureas has been recognized in Chambers & Partners-Global: Arbitration, Public International Law and Arbitrators, respectively, as a “Most Highly Regarded Partner–The Americas” by Who’s Who Legal and “Attorney of the Year” by the Hellenic Lawyers Association. Hioureas has acted for and advised Armenia, Bangladesh, Chile, Croatia, Cyprus, Ghana, Greece, Guyana, Japan, Liechtenstein, Luxembourg, Mauritius, Montenegro, Qatar, Sierra Leone and Uzbekistan and various State-owned and private entities across jurisdictions and industries.

Her work in arbitration includes construction, hospitality, taxation, solar power, oil&gas pricing/supply under investment treaties and foreign investment laws, as well as JVA, JDA, EPC, and PPA, in claims up to $10 billion. In international law, her work includes decolonization, jus cogens, law of occupation, protection of the environment, sea level rise, and rendition.

As arbitrator, she has resolved disputes under UNCITRAL, ICC, ICDR, AAA, and LCIA Rules; seated in The Netherlands, Luxembourg, UK, France, Sweden, US and Canada.