At Quinn Emanuel Urquhart & Sullivan, LLP, the international arbitration team supports clients with both investment treaty and commercial cases, with strengths in the oil and gas and mining sectors. Stephen Jagusch is the global chair of international arbitration and brings extensive experience in the space, having advised clients in LCIA, ICC, and DIAC matters, while Anthony Sinclair has strong skills in ICSID and UNCITRAL work. Epaminontas Triantafilou supports both investors and states on investment treaty issues. Dominic Roughton focuses on natural resources and joint venture disputes, and Andrew Savage, who joined the team in November 2025, assists on financial cases. Manthi Wickrama-sooriya and Hafsa Zayyan are two further key members of the team.
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Accolades
Client satisfaction: Sector knowledge
Client satisfaction: NPS ®
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Dominic Roughton
Andrew Savage
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Manthi Wickrama-sooriya
Hafsa Zayyan
Practice head
Stephen Jagusch KC; Anthony Sinclair; Epaminontas Triantafilou
Other key lawyers
Dominic Roughton; Andrew Savage; Manthi Wickrama-sooriya; Hafsa Zayyan