He specialises in International and comparative law, and human rights.

President of DWI - Institute for International Law and Relations of São Paulo (since September 2018); Lawyer admitted to Brazilian Bar in São Paulo; coordinated courses on International Law at the Higher School of the Brazilian Bar Association (ESA-OAB-SP) (May 2019 to June 2021); coordinator of CEPIM - Centre of Studies on the International Protection of Minorities at USP and coordinator of GEBRICS - Group of Studies on the BRICS at USP.

Invited to lecture on "International Law, History and Culture" at The Hague Academy of International Law (January 2020), "Gilberto Amado Memorial Lecture" at the UNO International Law Commission, in Geneva (17 July 2013), courses at )(XXVI and XIII Courses on International Law at the Organization of American States (OAS) in 2009 and 2015, lectured at the Permanent Tribunal of Revision of the MERCOSUL in Asuncion, where he was awarded the Rosalba Medal and Diploma (2015) "in recognition of his contribution to International Law", lectured at the Ministry for Foreign Affairs of the Netherlands, The Hague (2013), lectured at the Institute for Latin America of the Russian Academy of Sciences, Moscow (2014), as well as at the Universities of Amsterdam, Asuncion, Berlim-Humboldt (2012, 2016), Bielefeld, Minho at Braga (2018, 2019, 2020), Buenos Aires, Coimbra, Cordoba, Heinrich Heine in Diisseldorf, Florence, Hamburg, Heidelberg, Helsinki, Hiroshima, Johannesburg, Leyden, Lisbon, European University of Lisbon, Lodz, Luxembourg, Lyon III (2000, 2015, 2016, 2018), Maastricht, Macau (from 2007 to 2012), Maputo, Mathura, Milan- Bocconi, Montreal, New Delhi, Nice, Ottawa, Paris-Sorbonne (2007, 2010, 2018), Paris-Pantheon-Assas, Rennes, Rome I - La Sapienza (2009, 2014), Rome II - Tor Vergata (2013), SaarbrUcken (1993, 1995), Saint Petersburg (2019) and the National Research University in Saint Petersburg (2011, 2014), Salamanca, Strasburg (where he also co-directed a Doctor degree completed in 2014), Tokyo-Meiji, Tlibingen, at the Brazilian Society for the Development of the Sciences (SBPC) (2015), the Ministry for Foreign Affairs in Brasilia and the Alexandre de Gusmao Foundation, in Rio de Janeiro as well as several Brazilian Universities.

Fluent (speaks, reads and writes) in English, French, German, Italian, Portuguese and Spanish.

He has good knowledge of Russian, Latin and Ancient Greek.