Department profile
Debevoise & Plimpton LLP

Public International Law

Global Guide 2026 : Global Market Leaders

Share profile

Debevoise & Plimpton LLP

Rankings

Chambers Review

Provided by Chambers

Public International Law - Global Market Leaders

Band 1

What the Team is Known For

An established market leader with a reputation for excellence in international arbitration and PIL, Debevoise & Plimpton has cultivated an excellent reputation across the Latin America, Europe, Middle East and Asia markets. The law firm offers:

• Expertise in securing large arbitral awards in high-profile commercial and investment treaty disputes.

• Representation of both investors and respondent states to act in cases under ICC, ICSID and UNCITRAL rules.

• Outstanding experience in 'pure' PIL matters, including state-to-state human rights claims and maritime boundary disputes.

View ranking table

Strengths

Provided by Chambers

  • Debevoise & Plimpton have a good sense of what clients want and they put their case together excellently.

    Public International Law respondentGlobal

  • Debevoise & Plimpton have exceptional client contact and sector knowledge, legal expertise and experience in specialised fields, terrific attorney-client relationship and client management.

    Public International Law respondentGlobal

  • They operate at the very top of the profession, bring a great deal of expertise in PIL and fully understand the sector.

    Public International Law respondentGlobal

Notable Practitioners

Provided by Chambers

  • Catherine Amirfar
    Catherine Amirfar

    Catherine Amirfar

    Catherine Amirfar is based in New York and co-chairs the firm's public international law group. She is a highly reputed practitioner in the field of PIL and arbitration, noted for her exceptional expertise advising on state-to-state disputes, investment treaty arbitration, international criminal law and climate change litigation matters.

    • Catherine is the best of the best when it comes to international law, client relations and getting things done.

      Public International Law respondentGlobal

    • Catherine's legal analysis and intellectual depth in the law is unparalleled.

      Public International Law respondentGlobal

    • Catherine is very knowledgeable and very effective in communicating the key issues.

      Public International Law respondentGlobal
    View profile
  • Mark W Friedman
    Mark W Friedman

    Mark W Friedman

    Mark Friedman co-chairs the firm's international dispute resolution group and is based in New York. He is widely considered a preeminent figure in the international arbitration field, and his broad practice sees him often advising international corporations and investors in complex commercial and investment treaty arbitrations.

    • Mark takes the time to deeply understand the commercial, technical and market situation of cases, and he is a pleasure to work with.

      Public International Law respondentGlobal

    • Mark is very good and organised. His leadership is excellent and he cooperates with everyone extremely well.

      Public International Law respondentGlobal

    • Mark is outstanding. He is an industry leader and at the top of his game.

      Public International Law respondentGlobal
    View profile
  • Natalie Reid
    Natalie Reid

    Natalie Reid

    Natalie Reid co-chairs the firm's public international law group and noted for her deep knowledge of international human rights and ESG. She offers a robust practice advising NGOs, sovereign states and global corporations on high stakes disputes.

    • Natalie is an exceptional lawyer, a sophisticated international negotiator, a trusted adviser, and a kind and considerate person - she is a rare gem.

      Public International Law respondentGlobal

    • Natalie has a fantastic detail-oriented manner. She can step back and look at the bigger picture, and she has taken on a lot of work that benefits the arbitration community.

      Public International Law respondentGlobal

    • Natalie is a great listener, very collaborative and a first class lawyer. She has very well thought out arguments, is a good communicator and is very succinct in her presentations.

      Public International Law respondentGlobal
    View profile
  • Jeffrey Sullivan
    Jeffrey Sullivan

    Jeffrey Sullivan

    Jeffrey Sullivan KC is based in London and is widely recognised for his ability to lead arbitrations across a plethora of sectors and industries, most notably in energy and infrastructure. He also has a wealth of experience advising high profile international clients before major arbitral tribunals under ICSID, UNCITRAL and LCIA rules.

    • Jeffrey delivers straight forward practical advice and has great client-handling skills.

      Public International Law respondentGlobal

    • Jeffrey is very succinct in his advice and is very knowledgeable on the subject matter.

      Public International Law respondentGlobal

    • Jeffrey is a great leader, pragmatic and conveys complex issues in a simple way. He also has great oral and written communication skills.

      Public International Law respondentGlobal
    View profile
  • Dietmar Prager
    Dietmar Prager

    Dietmar Prager

    Dietmar Prager is an experienced practitioner who often handles USA and Latin American arbitrations. He is often sought after by international investors and foreign companies, and has particularly strong capabilities in arbitrations relating to energy and natural resources.

    • Dietmar is very skilled at forming legal strategies and arguments. He has strong language skills, is a strong communicator and is a pleasure to work with.

      Public International Law respondentGlobal

    • Dietmar is a tenacious advocate. He pays attention to the detail, is responsive, collegial and substantively on top of things.

      Public International Law respondentGlobal

    • Dietmar has great leadership qualities, is very empathetic and is strategically ambitious. He is flexible in understanding how cases change.

      Public International Law respondentGlobal
    View profile
  • Ina C Popova
    Ina C Popova

    Ina C Popova

    Ina Popova is based in New York and is noted for her capabilities advising sovereign states, multinational companies and other high profile clients in large scale and high value arbitrations. She also has expertise in Latin America-related matters.

    View profile

Ranked Individuals at Debevoise & Plimpton LLP (8)

Global Market Leaders

Debevoise & Plimpton LLP has rankings in the following guides

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership