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François-Xavier Grignon-Derenne, a Doctor of Law, was a lecturer and research associate at the Parisian Université Panthéon-Assas (Paris II) for several years during which he lectured on many occasions on contract, business and finance law as well as on businesses in financial difficulty.

François-Xavier Grignon-Derenne has been a member of the Paris Bar since 2000 and has practised at several high-ranking business law firms both as counsel and in the context of litigations and arbitrations.

Thanks to his high-level academic background and his perfect command of the legal world and its practices, François-Xavier Grignon-Derenne often works on cases where the interests at stake often exceed 10 million euros.

François-Xavier Grignon-Derenne is a member of the Institut Français des Praticiens des Procédures Collectives (French Institute of the Collective Procedures’ professionals).

• Doctor of Law, Université Panthéon-Assas (Paris II), 1999, very honourable distinction with commendation from the jury
• DEA (advanced postgraduate diploma) in Corporate and Economic Law, Université Panthéon-Assas (Paris II), 1993, graduated cum laude, valedictorian
• Certificat d’Aptitude à la Profession d’Avocat (Professional Lawyer’s Certification), Centre régional de formation des barreaux du ressort de la Cour d’Appel de Paris (Bar Admission Course of the Paris Court of Appeal), 1993
• Master’s Degree in Private Law, speciality Corporate Law and Tax Law, Université Panthéon-Assas (Paris II), 1992, graduated cum laude

Retour sur la procédure applicable au dirigeant poursuivi pour insuffisance d’actif ou en sanction professionnelle, published in the periodical Revue des procédures collectives civiles et commerciales, septembre-octobre 2017, étude n° 16
Le fabuleux destin du centre des intérêts principaux dans les groupes de sociétés en difficulté, Mélanges Christian Larroumet, Economica, 2010, p. 211
Mandat ad hoc et conciliation : deux bouées de sauvetage pour éviter la faillite, published in the periodical Chef d’entreprise magazine, mai 2009, p. 65
Méthodes d'exercices juridiques, co-author of this book alongside Sarah BROS, Professor of law at the University of Dauphine-PSL, editor Francis Lefèbvre, 2007
An introduction to the French civil procedure, a conference held before the members of American Board of Trial Advocates (ABOTA), Monte-Carlo, May 2007
À propos du cautionnement disproportionné, annotation on cas law following the Paris Court of Appeal’s decision of 06/27/2000, 
Contribution à l’étude des accessoires de la créance, doctoral thesis, 336 pages, under the supervision of Christian LARROUMET, 1999


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Léa Schwachtgen
Legal assistant

After working in several companies, Léa joined THALLER AVOCATS as a legal assistant in 2021.

She is responsible for the firm's general services (administration and organization, management, planning) and for the interface with clients and suppliers.

Léa also provides legal support in the field of litigation as well as the area of legal advice.