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Manuel de Almeida Ribeiro

In January 2021, Professor Manuel de Almeida Ribeiro was appointed by Portugal as arbitrator of the OSCE Court of Conciliation and Arbitration and subsequently elected as a members of the Court’s Bureau in November 2025.

Arbitrator of the Court

In January 2021, Professor Manuel de Almeida Ribeiro was appointed by Portugal as arbitrator of the OSCE Court of Conciliation and Arbitration and subsequently elected as a members of the Court’s Bureau in November 2025.

Source:
Court of Conciliation and Arbitration

Biography

Manuel de Almeida Ribeiro is a distinguished Portuguese international lawyer and arbitrator. He served as President of the International Law Association (ILA) from 2020 to 2022, and was for many years President of the Sociedade Portuguesa de Direito Internacional, the Portuguese branch of the ILA. 

He enjoyed a long academic career: from 1983 until 2021, he was Professor of International Law (and related disciplines) at the Instituto Superior de Ciências Sociais e Políticas (ISCSP) of the University of Lisbon. 

In the private and public sectors, Ribeiro has extensive experience: he was Legal Counsel for Galp Energia / Petróleos de Portugal S.A. from 1995 to 2013. He also served as Adviser to the Prime Minister of Portugal between 1992 and 1995. 

Ribeiro holds a PhD in Political Science (1992) from the Technical University of Lisbon. He also earned an “agregação” (a senior academic qualification) in Legal and Political Sciences from the same university in 2002. Earlier in his education, he obtained a law degree from the State University of Rio de Janeiro. 

He is a seasoned arbitrator and mediator. At present he is “Of Counsel” at SRS Legal in Portugal, with particular expertise in arbitration (especially in energy) and mediation. 

In January 2021, Professor Ribeiro was appointed by Portugal as arbitrator of the OSCE Court of Conciliation and Arbitration and subsequently elected as a members of the Court’s Bureau in November 2025.