Róisín Á Costello is Assistant Professor of EU Law at Trinity College Dublin, Ireland.

She was previously Assistant Professor in the School of Law and Government at Dublin City University, Ireland. A graduate of Trinity College Dublin, the Institut d'études politiques de Paris and Georgetown Law, Róisín is a qualified barrister and researches and works on EU law, fundamental rights (with a particular focus on privacy and property rights), media law, language rights, and law and literature. Her research has been supervised by and conducted alongside some of the leading privacy lawyers in Ireland, and internationally, including Professor Julie E Cohen, Professor Alvaro Bedoya and Professor Neil M Richards, Dr Federico Fabbrini and Dr Eoin O'Dell.

Róisín has previously worked with the Georgetown Centre for Privacy and Technology Law and epic.org in Washington DC, researching the interaction of privacy and consumer technologies, and has published widely in leading peer-reviewed journals on the subjects of privacy and data protection. Róisín completed her PhD in Law at Trinity College Dublin where her doctoral research was funded by the Irish Research Council and examined private actors as norm setters in the digital environment. Prior to joining DCU, Róisín was Assistant Lecturer in Media and IT Law at Maynooth University and taught at Trinity College Dublin.

MR Leiser, formerly of Vrije Universiteit-Amsterdam and Leiden University, the Netherlands, is an expert specialising in digital, legal, and platform regulation. In addition to consultancy work, he helps run the deceptive.design website (formerly darkpatterns.org).