Research

The School carries out applied research with the purpose of developing economically, legally, and socially-sound regulation and policy, using a multidisciplinary approach.

EU transport competitiveness

The European Union is entering a decade that will be decisive for its global competitiveness. This is particularly the case in the transport sector....

Authors
Elodie Petrozziello JJMP
Article
Should I offset or should I plough? : voluntary carbon offsets and ETS in an evolutionary model
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Article
The regulatory framework for independent aggregators
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Executive Education

We offer different types of training: Online, Residential, Blended and Tailor-made courses in all levels of knowledge.

13 November 2026
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Policy Events

A wide range of events for open discussion and knowledge exchange. In Florence, Brussels, worldwide and online.

11 November 2026 09:15
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More

Discover more initiatives, broader research, and featured reports.

Energy Regulation Academy

The Energy Regulation Academy (EnRA) is a 3-year capacity-building initiative to help accelerate the energy transition in Europe.

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Opportunities
Opportunities
FSR.secretariat@eui.eu

Guillaume Teissonnière

General Counsel of eDreams ODIGEO

Biography

Guillaume serves as a General Counsel and Company Secretary at eDreams ODIGEO (eDreams, Opodo, Travellink, Liligo). Guillaume has been a General Counsel of eDreams ODIGEO since April 2016. Prior to joining eDreams ODIGEO, Guillaume worked as a Partner lawyer at the Paris and Brussels Bar with a practice focused in e-commerce, Tourism law, European law and IP/IT litigation. Guillaume is a member of the Board of EU Travel Tech (Chairman from 2019 to 2021) and is actively involved in all legal and regulatory matters impacting the transport and tourism industry currently discussed at EU level. Guillaume has also been a lecturer in e-commerce law in several French Universities (Paris Panthéon-Assas, Bordeaux and Strasbourg). Further to his native French, Guillaume speaks English and Spanish and some Italian.

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