Former Judge and President of Chamber of the General Court of the European Union in Luxembourg from 2019 to 2025. His appointment strengthens the firm’s positioning in the areas of EU law and competition law, fields in which he brings the expertise gained at the highest levels of European judicial activity and public administration, where he served as Legal Adviser for Legislative Affairs at the Presidency of the Council of Ministers.
Over the course of his career, Prof. Mastroianni has also developed a distinctive expertise in the regulation of the Media and TMT sectors, with particular focus on digital single market dynamics and antitrust regulation as applied to technology platforms. In parallel with his role as Full Professor at the University of Naples Federico II, his contribution enables GA-Alliance to assist clients in cross-border disputes and complex proceedings, integrating the perspective of a judicial decision-maker with strategic advisory services.
Academic activities
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Full professor of European Union law, University of Naples Federico II, Department of Law (since 2001).
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Visiting professor at Washington College of Law, American University, Washington (USA) (since 2015).
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Professor of European Union Law in the Department of Political Science at LUISS Guido Carli University in Rome (courses in English) – From the 2013/2014 academic year to the 2016/2017 academic year
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Visiting professor in the master’s courses in European Union law and European litigation law at the University of Paris II – Pantheon-Assas – From the 2011/2012 academic year to the 2012/2013 academic year
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Lecturer in European Institutions in the Master of European Studies programme at LUISS Guido Carli University in Rome (in English) – From the 2007/2008 academic year to the 2009/2010 academic year.
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Lecturer in European labour law at the Faculty of Political Science, LUISS Guido Carli University, Rome – From the 2005/2006 academic year to the 2006/2007 academic year.
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Lecturer in media law at the Faculty of Law of the Suor Orsola Benincasa University Institute, Naples – From the 2001/2002 academic year to the 2007/2008 academic year.
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Lecturer in substantive European Union law (competition law and public procurement law) at the Faculty of Law of the University of Naples Federico II – From the 2004/2005 academic year to the 2010/2011 academic year.
Education and qualifications
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Master of Laws (LL.M.),Penn State /Dickinson School ofLaw , Carlisle PA (USA ), 1992
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PhD in European Union Law, University of Bologna, 1991
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Qualification as lawyer admitted to the bar (Avvocato), 1990
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Bachelor’s degree in Law, University of Florence, 1987
Publications
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La nozione di vulnerabilità nel diritto dell’unione europea e la tutela delle vittime dei reati (Editoriale Scientifica, 2026) – Monograph
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Il diritto processuale dell’Unione europea (ed.), Giappichelli, Torino, 2025 – Manual
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Diritto dell’Unione europea (Parte speciale – con Girolamo Strozzi), VII ed., Giappichelli, 2024. – Manual
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Media Law in Italy (con A. Arena), Kluwer International, 2011 (III ed. 2023) – Monograph
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Diritto dell’Unione europea, parte istituzionale (con G. Strozzi), IX edizione, Giappichelli, Torino, 2023 – Manual
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Il contenzioso comunitario (con M. Condinanzi), Giappichelli, Torino, 2009 – Manual
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La direttiva comunitaria sui servizi di media audiovisivi, Giappichelli, Torino, 2009 (II ed. 2011) – Monograph
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Riforma del sistema radiotelevisivo e diritto europeo, Giappichelli, Torino, 2004 – Monograph
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Diritto internazionale e diritto d’autore, Giuffrè, Milano, 1997 – Monograph
