CNRS senior researcher at the Néel Institute, member of the SIN team, my main research activity is related to the theory and the development of x-ray spectroscopies as a probe of materials. Most of the work concerns the development and the broadcasting of the FDMNES ab initio computation code. Its function is to simulate x-ray absorption, emission and scattering spectroscopies. The calculated spectra can then be compared to data often recorded under synchrotron radiation. The main goal is to extract information on the electronic, magnetic and structural properties of all classes of systems.