Department profile
A&O Shearman

Public International Law

UK Guide 2026 : UK-wide

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A&O Shearman

Rankings

Chambers Review

Provided by Chambers

Public International Law - UK-wide

Band 3

What the Team is Known For

A&O Shearman has a strong track record in representing sovereign states and corporates in high-value investment treaty disputes. It has considerable experience carrying out its own advocacy before courts and tribunals. The firm is also adept at handling a number of other PIL matters, such as ECT claims, WTO cases, sovereign immunity concerns, and international treaty drafting and negotiation. The team also advises on international human rights issues.

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Work Highlights

Provided by Chambers

  • A&O Shearman represented the Federal Republic of Somalia in its accession to the World Trade Organisation.

Notable Practitioners

Provided by Chambers

  • David Herlihy
    David Herlihy

    David Herlihy

    David Herlihy has tremendous experience in investor-state arbitrations as well as broader PIL matters. He regularly acts on behalf of both companies and sovereign states in big-ticket disputes brought under BITs, as well as providing advice on issues concerning international human rights law.
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  • Guled Yusuf
    Guled Yusuf

    Guled Yusuf

    Guled Yusuf has developed a strong practice which spans investor-state disputes and a broad range of PIL matters, including trade law and border delimitation issues.
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Ranked Individuals at A&O Shearman (2)

UK-wide

A&O Shearman has rankings in the following guides

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