Applications are welcomed for two PhD positions in Navier Laboratory (Ecole des Ponts ParisTech, Univ. Gustave Eiffel, CNRS) on geomechanical modeling for application to nuclear waste storage. The first topic aims at investigating the role of bound water on the THM couplings of claystone, the second topic is dedicated to fluid-induced cracking in fractured claystone. Candidates must hold a Master of Science or equivalent in mechanics and physics of (geo)-materials with a strong taste for numerical modeling.