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Lawyers profile | Global 2024: Public International Law, International Arbitration, Arbitration (International)
Stephen Fietta KC
Ranked in 4 Practice Areas
1

Band 1

Public International Law

Global Market Leaders

4 Years Ranked

2

Band 2

International Arbitration

UK

2 Years Ranked

4

Band 4

Arbitration (International)

Global Market Leaders

4 Years Ranked

4

Band 4

Arbitration (International)

Europe-wide

6 Years Ranked

Ranked in Guides
UK 2025
Europe 2024

About

Provided by Stephen Fietta KC

Global

Practice Areas

Stephen Fietta KC, principal and founder of Fietta LLP, is one of the leading specialist public international lawyers in private practice. He has counselled States, international organisations and private clients on a broad range of PIL issues over the past 20 years. He has advised in connection with disputes heard before the ICJ, ITLOS, ECHR, CJEU and arbitral tribunals operating under (among others) the ICSID, UNCLOS, UNCITRAL, PCA and SCC Rules. He is particularly active in international investment disputes and maritime boundary disputes and has won some of the largest investment arbitration awards of recent years. He also has an extensive PIL advisory practice and regularly conducts training for government lawyers around the world. Stephen is a Visiting Senior Lecturer at King’s College, London, where he lectures on international sovereignty, maritime delimitation and environmental disputes.

Publications

Stephen has published widely on various public international law and international arbitration topics. He was awarded the Smit-Lowenfeld Prize for best article (co-authored by Dr James Upcher) globally in the field of international arbitration and co-authored (with Dr Robin Cleverly) A Practitioner’s Guide to Maritime Boundary Delimitation (OUP, published March 2016), which has subsequently been cited before both the ICJ and ITLOS.

Chambers Review

Provided by Chambers

Global

Public International Law - Global Market Leaders

1
Band 1
Individual Editorial

Stephen Fietta KC is a highly-respected name in the public international law and international arbitration market. He draws on his robust experience and expert capabilities to lead disputes involving investment treaty law, maritime law, state succession and international environmental law.

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International Arbitration - UK

2
Band 2
Individual Editorial

Stephen Fietta KC is a recognised authority in investment treaty arbitration and broader PIL concerns. He acts for an extensive roster of clients, including major corporations and individuals, in BIT claims and other disputes involving sovereign states.

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Arbitration (International) - Europe-wide

4
Band 4
Individual Editorial

Stephen Fietta KC of Fietta LLP is often mandated by investors for his prowess in handling Europe-wide investment treaty arbitration under SCC, UNCITRAL and ICSID rules.

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Arbitration (International) - Global Market Leaders

4
Band 4
Individual Editorial

Stephen Fietta KC is a highly-respected name in the public international law and international arbitration market. He draws on his robust experience and expert capabilities to lead disputes involving investment treaty law, maritime law, state succession and international environmental law.

Learn more about this team❖View ranking table

Strengths

Provided by Chambers

"Stephen is a master in the field. You cannot talk about PIL leaders in London without talking about Stephen."

Public International Law respondent
Global

"Stephen has the most strategic view on how to handled sophisticated subjects and how to make a roadmap of what is the best course of action for a case. He makes a great presentation on PIL and it is very impressive."

Public International Law respondent
Global

"The quality level of Stephen's work is really one of the best I have seen in the industry. Very diligent and easy to work with. He can deal with all nefarious issues."

Public International Law respondent
Global

“He gives clear and comprehensive advice based on his significant experience.”

International Arbitration respondent
Global

“Stephen's strategic acumen is second to none.”

International Arbitration respondent
Global

“The quality level of his work is really some of the best I have seen in the industry. He is very diligent and easy to work with.”

International Arbitration respondent
Global

"He is a great lawyer who specialises in investment treaty arbitration. One of the strongest names in the market."

Arbitration (International) respondent
Global

“He gives clear and comprehensive advice based on his significant experience.”

Arbitration (International) respondent
Global

“Stephen's strategic acumen is second to none.”

Arbitration (International) respondent
Global

“The quality level of his work is really some of the best I have seen in the industry. He is very diligent and easy to work with.”

Arbitration (International) respondent
Global

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Fietta LLP

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Europe-wide

Arbitration (International)
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Stephen Fietta KC
4
Band 4
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Global Market Leaders

Arbitration (International)
4
Stephen Fietta KC
4
Band 4
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Public International Law
1
Stephen Fietta KC
1
Band 1
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UK

International Arbitration
2
Stephen Fietta KC
2
Band 2
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