I have co-organized the following events :
• Workshop : “Field Theories and Higher Structures in Mathematics and Physics” 05/06/17-09/06/17, Casa Matemática Oaxaca, Oaxaca.
• Workshop : “Lens Topology and Geometry Meeting 2016” 17/11/16-18/11/16, LML, Lens.
• Spring School : “Virtual Grothendieck-Teichmüller” 23/05/16-27/05/16, Médhia.
• Workshop : “Lens Topology and Geometry Meeting 2015” 15/06/15-16/06/15, LML, Lens.
• Spring School : “Medhia School in Mathematical Physics and Topology” 01/06/15-05/06/15, Médhia.
• Workshop : “Lens Topology and Geometry Meeting 2014” 03/11/14-04/11/14, LML, Lens.
• Workshop : “Lens Topology and Geometry Meeting 2013” 09/09/13-09/10/13, LML, Lens.
• Satellite session at the Mathematical Congress of the Americas : “Mathematical Physics, Operad Theory, Algebraic Topology and Higher Categories” 08/08/12-08/09/13, Guanajuato.
• MIT Lecture Series : “An introduction to Grothendieck-Teichmueller theory” 11/05/12-11/09/12, MIT, Boston.
• Working group : “Grothendieck-Teichmueller” 08/21/12-08/21/12, MPIM, Bonn.
• Weekly Seminar : “Physique Mathematique” 2010-2011, Universite de Lille.
• Journées Bonn-Luxembourg-Strasbourg “Operads” 10/04/10-10/05/10, RMATH, Luxembourg University.
• Petit groupe de travail : “Catégorification et invariants topologiques ” 06/28/10-07/02/10, CIRM, Marseille.
• School-Conference “GEOQUANT” 08/28/09-09/11/09, RMATH, Luxembourg University.
• School-Conference “Hopf-in-Lux/JMML-I” 07/13/09-07/17/09, RMATH, Luxembourg University.
• Workshop “Around operads and cohomology of algebraic structures” 12/16/08-12/19/08, RMATH, Luxembourg University.
• Workshop “On Krichever-Novikov Algebras” 06/09/08-06/11/08, RMATH, Luxembourg University