The ENVIBRO project announces the opening of 5 post-doctoral positions. ENVIBRO is a Thematic Project that combines the efforts of Brazilian research groups from the University of São Paulo (USP), São Paulo State University (UNESP), University of Campinas (UNICAMP), Technological Institute of Aeronautics (ITA) and also a number of international collaborators to investigate periodic structures in the context of phononic materials and elastic/acoustic metamaterials.