Étienne Guyon is a senior scientist at ESPCI (Paris Industrial Physics and Chemistry Higher Educational Institution) and a fellow of the American Physical Society, Honorary Director of the Ecole Normale Supérieure, and author of textbooks and books for a general readership.

Jean-Yves Delenne is Director of Research at INRAE (the French National Research Institute for Agriculture, Food and Environment).He is a pioneer in research on advanced numerical simulations of granular materials.

Farhang Radjai is Director of Research at the CNRS (the French National Center for Scientific Research). He is a pioneer in research on advanced numerical simulations of granular materials.