Debevoise & Plimpton LLP Appoints Jeffrey Sullivan KC and Ina Popova as Co-Chairs of European Litigation

Debevoise & Plimpton LLP Strengthens Leadership in European Litigation

On March 18, 2026, Debevoise & Plimpton LLP made an important announcement regarding the leadership of its European litigation sector. The prestigious law firm has appointed partners Jeffrey Sullivan KC and Ina Popova as co-chairs of their European Litigation practice, which is headquartered in Paris, Frankfurt, and Luxembourg. The strategic move is expected to bolster Debevoise’s robust reputation in handling large-scale litigation across continental Europe.

Catherine Amirfar, who co-chairs Debevoise's Global International Dispute Resolution Group, expressed confidence in the new leadership duo. She stated, "Jeff and Ina’s leadership will enhance Debevoise's strong track record in high-stakes litigation in continental Europe, ensuring we continue to provide our clients with the highest level of representation and strategic advice." This announcement comes as Debevoise aims to strengthen its litigation teams across key regions, joining other leaders like Dietmar Prager in Latin America and Tony Dymond in Asia.

Profiles of the New Co-Chairs

Jeffrey Sullivan KC

Sullivan KC will continue to serve in his current role as co-chair of the firm’s International Dispute Resolution Group. His extensive experience focuses on international arbitration and public international law. Recognized as one of the most respected attorneys in the field, he represents corporations and private equity sponsors in commercial and investment arbitrations before premier arbitration institutions. Sullivan is also actively involved as an arbitrator, bringing years of expertise to the table.

Ina Popova

Popova’s expertise lies in international arbitration, public international law, and litigation related to arbitration. Her practice involves representing corporations, sovereign states, and individuals in the prevention, management, litigation, and resolution of international disputes. Furthermore, she advises asset managers and investment funds on evaluating investments in claims and international awards. With her dual qualifications in civil law and common law, Popova adeptly handles matters in multiple languages, including English, French, Italian, and Spanish. Her previous experience includes serving as a member of the International Chamber of Commerce (ICC) Court of Arbitration, and she also functions as an arbitrator in various cases.

Debevoise’s Distinguished International Dispute Resolution Group

For over four decades, Debevoise’s International Dispute Resolution Group has been recognized for its effective defense, strong commercial judgment, and unparalleled dedication to clients. The team is adept in both common and civil law systems, speaking over 35 languages, and has successfully handled cases involving more than 125 countries with stakes exceeding $110 billion. Debevoise has received accolades for achieving some of the most significant and impactful results in international arbitration and public international law, with Global Arbitration Review noting, "If there's any team that has consistently achieved 'big wins,' it appears to be Debevoise."

In conclusion, the strategic appointment of Sullivan KC and Popova is set to further enhance Debevoise & Plimpton LLP’s competitive edge in the ever-evolving landscape of international litigation, reaffirming its commitment to delivering outstanding legal services to clients worldwide.