SILK PROFILE
Zoe O'Sullivan KC

Zoe O'Sullivan KC

UK Bar 2026

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Ranked in 4 practice areas

About

Provided by Serle Court

Practice Areas

Zoe O’Sullivan KC is a robust and experienced advocate who thrives on the challenges of oral advocacy and cross-examination. She is recommended as a Leading Silk by Chambers UK Bar for Commercial Dispute Resolution, Banking & Finance and Information Technology. Zoe is also recommended in Dispute Resolution (The English Bar - United Arab Emirates) by Chambers Global.

Zoe is described in Chambers UK as “very easy to work with and very hands-on”, “very technically able” and “formidably bright”. The Legal 500 says: “Zoe is - even by the standards of the commercial bar - highly intelligent and extremely diligent: she is seriously very hard-working. As a result she displays complete mastery of the documents and of the law. She is an extremely tough, but always fair and decent, opponent. A star silk for the future.”

Zoe’s commercial/Chancery practice spans a broad range including IT and outsourcing disputes, shareholder disputes/joint ventures, directors’ duties, banking and finance, civil fraud, oil and gas, and shipbuilding. She is highly experienced in jurisdiction issues and in key interim applications including freezing orders, anti-suit injunctions, and applications under section 44 of the Arbitration Act 1996.

Zoe is also ranked by the Legal 500 as both leading counsel and arbitrator in international commercial arbitration. She is regularly appointed as presiding, sole and co-arbitrator in claims proceeding under the LCIA, DIAC, ICC, HKIAC, SIAC and UNICTRAL rules.

Zoe is registered in the DIFC and admitted to the Bar of the BVI.

Chambers Review

Provided by Chambers

UK Bar

Information Technology - London (Bar)

Band 2
Band 2

Individual Editorial

Zoe O'Sullivan KC has a growing IT practice that sees her handling cases concerning software development and licensing, major contractual disputes and outsourcing issues. She is also experienced at handling healthcare technology issues as well as those in the insurance and housing sectors. O'Sullivan regularly handles matters involving public authorities.

Banking & Finance - London (Bar)

Band 4
Band 4

Individual Editorial

Zoe O'Sullivan KC is regularly sought out by high-profile banking and finance clients to deal with complex, often cross-border litigation. She also has impressive expertise in arbitration matters, which she can bring to bear in high-stakes cases.

International Arbitration: General Commercial & Insurance - London (Bar)

Band 4
Band 4

Individual Editorial

Zoe O'Sullivan KC earns praise for her deep expertise in international commercial arbitrations. She advises clients on a broad range of areas, including company law, banking and finance, oil and gas, and arbitration-related court proceedings, including relief applications, enforcement and challenges to awards. She has appeared in cases run under DIAC, LCIA, DIFC-LCIA, ICC, LMAA and UNCITRAL rules. She has built a strong reputation as a go-to counsel for matters concerning the Middle East.

Strengths

Provided by Chambers

  • She is very experienced in the technology sector.

    Information TechnologyUK Bar
  • She's my go-to. Zoe is a hard worker.

    Information TechnologyUK Bar
  • Zoe is ferociously smart, very user-friendly and tenacious.

    Banking & FinanceUK Bar
  • She is exceptionally good at picking her best point and running with that focused and targeted attack, which is more effective.

    Banking & FinanceUK Bar
  • Zoe is incredibly bright and tenacious. She isn't scared of anybody, and she will tell you straight out when she thinks that there is something wrong with your case.

    Commercial Dispute ResolutionUK Bar
  • Zoe is firm but charming. Her written work is very impressive, and she produces it quickly.

    Commercial Dispute ResolutionUK Bar

Ranked Barristers at Serle Court (158)

All Circuits

London (Bar)

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