Professor Rapp lectures at the University of Toulouse as well as at HEC, Paris as an affiliate Professor since 2012. He teaches international business law and competition law. He is also scientific director of SIRIUS (Space Institute for Research on Innovative Uses of Satellites), an academic chair created in 2013 by its three sponsors: CNES, Airbus Defense and Space (ADS) and Thales Alenia Space (TAS).
Professor Rapp authored – to date - 10 books and produced more than a hundred scientific works in his various fields of specialization.
As an expert of legal issues relating to space matters, he was appointed as
- a member of the High Level Expert Group, in charge of amending the French legislation to the opening to competition on 1 January 1998 of the French telecommunications market activities (interconnection charges, universal service funding, regulation of the local network);
- a Director of the Summer Research Centre of the Academy of International Law in The Hague on Global Telecommunications;
- a member of the High Level Expert Group convened by the EU Commission on the Galileo project;
- a Chairman of the Working Group on Space Telecommunications, set up by the Ministry in charge of Space for the development of a French space law;
- a member of the working group "Space Law" created under the auspices of the French Conseil d’Etat (Council of State) to draft the Law on Space Operations (Act No. 2008-518 of 3 June 2008).
Lucien Rapp regularly appears in world rankings and he is named one of the 77 best French lawyers of the year in the “Best Lawyers” 2021 ranking (Les Echos Executives, Qui sont les “Best Lawyers” 2021?, 20 June 2020). In his areas of expertise, he is on the list of international arbitrators of several international arbitration courts, including the ICC (International Chamber of Commerce) and LCIA (London Court of International Arbitration).
.Lucien Rapp was awarded the Academic Palms (Officer, 2009) and is a Chevalier of the Legion d’Honneur (since 2011).