There is a trend toward more flexibility and an increased interest in "smart” and ”adaptive” materials with the objective to meet most industrial specifications. Nitrides can be considered as such strategic materials. They attract increasing interest due to their properties targeted for future materials and technologies, especially their relatively high thermal robustness and chemical inertness, while bearing intrinsic multi-functionality. Inherent difficulties to the traditional techniques for manufacturing shaped ceramics (with a controlled porosity for example) can be overcome by the development of synthetic paths where chemistry of materials and ceramic science are combined rationally to process multi-scale complex solid state architectures. The Polymer-Derived Ceramics (PDCs) route offers new preparation opportunities in chemistry and ceramic sciences. The molecular origin of preceramic polymers and the possibility to shape then pyrolyze them into “near net shape” advanced ceramics play a major role in the preparation of nitrides endowed with properties that reach far beyond those of existing materials. Here, we report the preparation of nitride nanocomposite in which topologies, shapes and morphologies are tuned through the molecular design of preceramic polymers combined with shaping and pyrolysis processes. This presentation will be particularly focused on the preparation of nanocomposites from porous to dense structures for energy applications.