Practice Expertise

  • Public Law
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Areas of Practice

  • Public Law
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WSG Practice Industries

Profile

Tiago is a senior counsel in the Public Law practice and has more than 25 years’ experience in public law and arbitration. He is recognised as a lawyer, arbitrator and academic.

As a lawyer, Tiago specialises in administrative law. He is known for his work on major public-private partnership projects, in the public procurement stage, in implementing the contracts, and in administrative litigation and arbitration (domestic and international). He also has extensive experience in all phases of administrative procedure. Tiago has assisted private companies and public bodies in a range of matters, including their relationship with the Court of Auditors and the Constitutional Court.

As an arbitrator, he has extensive experience in domestic and international disputes, including as a sole arbitrator in an ICC arbitration. Tiago is also one of the four Portuguese arbitrators nominated by the Portuguese State to the International Centre for Settlement of Investment Disputes’ (ICSID) international panel of arbitrators. The ICSID is the most important investment arbitration centre in the world. Prior to this, Tiago, had already worked as a lawyer and legal expert in various ICSID arbitrations.

As an academic, Tiago has a doctorate in public law from Universidade Nova de Lisboa. He is also a professor at the Faculty of Law of Universidade Católica Portuguesa, where he is responsible for the subjects of constitutional law, administrative contracts, and international investment arbitration. Tiago is also a guest lecturer at other universities and a speaker on a variety of postgraduate courses.

He has carried out research and published writings in the areas of constitutional law, administrative law, public finances and international investment protection arbitration. Tiago was a Visiting Fellow at the University of Cambridge (Lauterpacht Research Centre for International Law and Wolfson College).

Bar Admissions
Admitted to the Portuguese Bar Association since 1997

Education
Degree in Law, Universidade de Lisboa Law School, 1995
PhD in Public Law, Nova University Law School, with a dissertation entitled "The Law behind the Budget - The constitutional issue of the Budget Law", 2005
Law Professor, Nova University Law School, since 2006
Lecturer in the PhD Program in ISCTEM University in Mozambique (2008)
Visiting Fellow at University of Cambridge (Lauterpacht Research Centre for International Law and Wolfson College), (2011-2012)
Lecturer in post-graduate courses related to international investment arbitration, Universidade do Minho Law School, Lisbon University Law School, Nova University Law School
Professor of Constitutional Law and Administrative Law at Nova University Law School, since 2006

Areas of Practice

  • Public Law

Professional Career

Significant Accomplishments
Chambers Europe
2024 - Tiago Duarte, Band 2 Public & Administrative Law
2023 - Tiago Duarte, Band 2 Public & Administrative Law
2022 - Tiago Duarte, Band 2 Public & Administrative Law
2021 - Tiago Duarte, Band 2 Public & Administrative Law
2020 - Tiago Duarte, Band 2 Public & Administrative Law
"Clients depict his work as "practical and solid"."

2019 - Tiago Duarte, Band 2 Public & Administrative Law
"He advises a broad array of clients, including concessionaires, public organisations and industry associations."

2018 - Tiago Duarte, Band 2 Public & Administrative Law
2017 - Tiago Duarte, Band 2 Public & Administrative Law
The Legal 500
2023 - Tiago Duarte, Recommended Public Law
2022 - Tiago Duarte Public Law
2021 - Tiago Duarte Public Law
2020 - Tiago Duarte Public Law
2019 - Tiago Duarte Public Law
2018 - Tiago Duarte Public Law
2017 - Tiago Duarte Public Law
Exclusive Winner of the ILO - International Law Office "Clients Choice Award" for Public Law (Portugal) 2011

Professional Associations
Member of the National Council of Ethics for the Life Sciences (Conselho Nacional de Ética para as Ciências da Vida), elected by the Portuguese Parliament

Seminars/ Presentation
Speaker in several Seminars in Portugal and abroad (Spain, Brasil)

Professional Activities and Experience
Senior counsel since 2023
Partner at PLMJ, 2008-2023
Legal adviser to the Secretary of State for the Presidency of the Council of Ministers, 1995-1997
Legal assistant to the Secretary of State of the Portuguese Communities - Ministry of Foreign Affairs, 1997-1999
Consultant at the Office of Legislative Policy and Planning of the Ministry of Justice, 2001-2004
Legal assistant and head of the cabinet of the Deputy Secretary of State of the Minister of Economy, 2002- 2003
Arbitrator in various arbitrations since 2009
Member of the panel of arbitrators at the Commercial Arbitration Centre (CCIP) and at the Administrative Arbitration Centre (CAAD) since 2012
President of Investment Arbitration Board of the Portuguese Arbitration Association (APA) since 2013
President of the Monitoring Committee of the New Urban Lease Law, 2013
Legal expert in international arbitration at the ICSID
Permanent member of the National Ethics Council for Life Sciences

Articles

La vem o caso Yukos, que tem muito que contar
to be published in Revista Internacional de Arbitragem e Conciliaçío, n.º 9

A sentença arbitral do ICSID no caso Dan Cake (Portugal) v. Hungria: Piece of cake ou também piece of
change?
to be published in Estudos em Homenagem ao Dr. Mario Esteves de Oliveira

Arbitragem de Investimentos em Angola: Mito ou possível realidade?
in Revista de Arbitragem Internacional de Angola, 2016

100 anos de Arbitragem – Os casos essenciais comentados
Advogados PLMJ, Arbitration
Coimbra Editora, Colecao Juridica PLMJ, Vol. IX, 2016

A não anulação da sentença SGS v. Paraguai e a anulação da sentença Occidental Petroleum v. Equador: qual
será¡ a Trendsetter?
in Revista Internacional de Arbitragem e Conciliação, vol. VIII, 2015

Anotaçío ao acórdío Salini Costruttori S.P.A. and Italstrada S.P.A. v. Kingdom of Morocco
100 anos de Arbitragem: os Casos essenciais comentados / Coleçío Jurídica PLMJ, 2015

O Salini Test na arbitragem do ICSID: Still crazy after all these years
in Estudos em Homenagem ao Dr. Rui Chancerelle de Machete, 2015

Providências cautelares, suspensões automáticas e resoluções fundamentadas: Pior a emenda do que o
soneto?
in Revista Julgar, n.º 26, 2015

Getting the Deal Through – Investment Treaty Arbitration
Tiago Duarte e Tomás Pessanha, 2014

Orçaamento
Tiago Duarte
in Enciclopédia da Constituição, 2013

Tratado de Lisboa Comentado
Tiago Duarte (co-autor), 2012

Arbitragem ICSID e desenvolvimento económico dos Estados, publicado nos Estudos em Homenagem ao
Professor Doutor Gomes Canotilho
in Estudos em Homenagem ao Professor Doutor Gomes Canotilho, 2012

A anulaçío de sentenças ICSID: Corrigir as sentenças ou corrigir as tendências?
José Miguel Júdice e Tiago Duarte
in Arbitragem Temas Contemporâneos (coord. Selma Ferreira Lemes e Inez Balbino), Brasil, 2012

A Arbitragem ICSID continua a surpreender: os casos SGS v. Paquistío, SGS v. Filipinas e SGS v. Paraguai –
três faces da mesma moeda?
in Estudos em Homenagem a Miguel Galvío Teles, 2012

La Regulación Económica. En Especial la Regulación Bancária: Conclusões, Actas del IX Congreso Hispano-Luso
de Derecho Administrativo (Córdoba)
in Actas del IX Congreso Hispano-Luso de Derecho Administrativo (Córdoba), 2012

Os Eléctricos de Marselha nío chegaram a Sintra: O Tribunal de Contas e os limites à modificaçío dos
contratos, publicado na Revista dos Contratos Públicos, n.º 3
in Revista dos Contratos Públicos, n.º 3, 2011

La anulación de sentencias CIADI: Corregir las sentencias o corregir las tendências?
José Miguel Júdice e Tiago Duarte
in Anuário Latino-Americano de Arbitraje, n.º 1 (Perú), 2011

As Fronteiras do Direito Público e a arbitragem internacional de protecçío de investimentos, publicado na
Scientia Iuridica, Tomo LX, n.º 326
in Scientia Iuridica, Tomo LX, n.º 326, 2011

A Lei de Bases do Ambiente como lei de valor reforçado, publicado no e-book A Revisío da Lei de Bases do
Ambiente
in e-book A Revisío da Lei de Bases do Ambiente, 2011

Treaty Claims, Contract Claims e Umbrella Clauses na arbitragem internacional de protecçío de investimentos
in Estudos em Homenagem ao Professor Doutor Carlos Ferreira de Almeida, 2011

A suspensío e a interrupçío do prazo para a impugnaçío judicial de actos administrativos: vale a pena
arriscar?
in Estudos de Homenagem ao Professor Doutor Paulo Pitta e Cunha, 2010

O Consentimento nas arbitragens internacionais (ICSID)
in Estudos em Homenagem ao Professor Doutor Sérvulo Correia, 2010

O âmbito da competência disciplinar da Comissío para a Eficácia das Execuções
in Scientia Iuridica, tomo LVIII, 2009
A Decisío de Contratar no novo Código dos Contratos Públicos
in Estudos de Contrataçío Pública I, 2008

O Provedor de Justiça e o Conselho de Estado
in O Provedor de Justiça – Novos Estudos, 2008

O reconhecimento e a execuçío de sentenças ICSID / CIRDI: Portugal à espera da primeira vez
in Estudos comemorativos dos 10 anos da Faculdade de Direito da Universidade Nova de Lisboa, 2008

Tribunal de Contas, visto prévio e tutela jurisdicional efectiva? Yes, we can!
in Cadernos de Justiça Administrativa, n.º 71, 2008

A Lei por detrás do Orçamento: A questío constitucional da Lei do Orçamento
Dissertaçío de Doutoramento, 2007

Portuguese Law an overview
Tiago Duarte (co-autor), 2007

A Lei do Orçamento e a Constituiçío de 1976: As duas Heranças
in Estudos em Homenagem ao Professor Doutor Marcello Caetano, 2006

Paul Laband e a crise orçamental Prussiana
in Estudos Jurídicos e Económicos em Homenagem ao Prof. Doutor António de Sousa Franco, 2006

Providência cautelar e resoluçío fundamentada: The winner takes it all? Comentário ao Acórdío do TCA – Sul
de 13.10.2005
in Cadernos de Justiça Administrativa, n.º 55, 2006

Quem tem medo dos cavaleiros de lei reforçada? Comentário ao acórdío do Tribunal Constitucional n.º 428/05
in Jurisprudência Constitucional, n.º 7, 2005

In Vitro Veritas? A Procriaçío Medicamente Assistida na Constituiçío e na Lei
Almedina, 2003

Legística Perspectivas sobre a concepçío e redacçío de actos normativos
Tiago Duarte (co - autor), 2002

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