Firm Profile > Fietta LLP > London, England

Fietta LLP

Public international law Tier 1

Arguably, 'one of the leading boutique practices in public international law', Fietta LLP has substantial expertise in investment treaty proceedings, maritime boundary disputes and human rights matters. The practice is regularly instructed by sovereign states, corporate, individual and NGO clients across a wide spectrum of public international law matters. Stephen Fietta QC has 'an outstanding reputation' in investment treaty arbitration and often leads on high-profile and substantial claims, including acting for a large group of Greek investors in an ICSID arbitration against the Republic of Cyprus arising from the Cypriot financial crisis and European Union/IMF bail-out of 2013. Also of note are recently promoted partner Jiries Saadeh, counsel Ashique Rahman and associates Oonagh Sands and Laura Rees-Evans.


Fietta is now undoubtedly the leading boutique in London in international arbitration and public international law. They have a large case load, and talent from top to bottom. No other boutique in London comes close.’

Stephen Fietta is one of the best experts on public international law and has a very good and experienced team behind him.

Jiries Saadeh is among the best three of his generation- definitely a name to note.

Ashique Rahman is an excellent counsel; Oonagh Sands and Laura Rees-Evans are also standout senior associates‘.

Key clients

Big Sky Energy Corporation

Arab Telemedia

City-State N.V. and others

Vincent Ryan / Schooner Capital LLC

International arbitration Tier 6

Fietta LLP 'has a large case load and has talent from top to bottom'. The firm is widely respected for its experience in investor-state arbitration. Stephen Fietta QC, who took silk in 2019, has secured numerous substantial awards for his state and investor clients; Jiries Saadeh and Ashique Rahman were promoted to partner and counsel, respectively. Oonagh Sands and Laura Rees-Evans are the senior associates to note.


Stephen Fietta QC is very smart and contributes effectively to any team‘.

Jiries Saadeh is simply fantastic‘.

Counsel Ashique Rahman is excellent and the associates are all very good‘.

Key clients

PL Holdings

Mohamed Abdel Raouf Bahgat

Theodoros Adamakopoulos and others

Big Sky Energy

Arab Telemedia

Fietta LLP is a unique law firm, specialising in public international law. Since its launch in 2015, Fietta has grown to 13 fee-earners, all of whom are specialists in public international law and international investment disputes.

The firm: Fietta brings together a team of true PIL experts at the forefront of their fields and an impressive track record of winning cases. At all levels of the firm, its lawyers have broad-based experience advising States, international organisations, private clients and individuals across a range of international law matters. Fietta lawyers have acted as counsel on some of the largest and most important PIL disputes of the past two decades, across a multitude of international court and tribunal settings. The firm’s advisory practice for State clients has encompassed some of the most sensitive PIL issues.

All of Fietta’s lawyers have previously practised at leading global or ‘Magic Circle’ firms. Most of its lawyers have also worked within governments, international courts or intergovernmental organisations and have postgraduate degrees in public international law. The firm regularly works as co-counsel with leading global firms, local and regional firms around the world and members of the public international law Bar.

Types of work undertaken: The firm’s experience includes investor-State dispute settlement; maritime, sovereignty and land boundary disputes; international environmental law; international organisations; and human rights.

Disputes: Fietta’s lawyers have represented clients in State-to-State, investor-State and other international law disputes for more than 20 years, at the pinnacle of PIL practice. Fietta’s lawyers have acted successfully as counsel to both investors and States in investment treaty arbitrations under all major institutional rules, winning some of the most substantial or notable awards in recent history; in State-to-State boundary and sovereignty disputes; and in leading human rights, environmental, sovereign immunity and other cases before the European Court of Human Rights, international and domestic courts.

Advisory: Fietta’s lawyers have advised States, international organisations, multinational corporations, NGOs and private individuals on public international law questions, including: treaty negotiation, interpretation and application; land sovereignty and maritime boundary negotiations; bilateral and multilateral investment treaties (including the Energy Charter Treaty); human rights; international environmental law; diplomatic and sovereign immunity; State succession; transboundary pipelines; and economic sanctions.

Department Name Email Telephone
Founder and principal Stephen Fietta QC
Partner Jiries Saadeh
Photo Name Position Profile
 Miglena Angelova  photo Miglena Angelova
 Lea Christopher  photo Lea Christopher
Mr Stephen Fietta QC photo Mr Stephen Fietta QC
 Ashique Rahman  photo Ashique Rahman
 Laura Rees-Evans  photo Laura Rees-Evans
 Jiries Saadeh  photo Jiries Saadeh
 Oonagh Sands  photo Oonagh Sands
 Fanny Sarnel  photo Fanny Sarnel
 Sam Winter-Barker  photo Sam Winter-Barker
Number of UK partners : 2
Number of other UK fee-earners : 11