Biologist engineer since 2014 and specialized in the development of industrial products, Ségolène DE VAUGELADE wanted to supplement her knowledge  in analytical chemistry during a CIFRE thesis in collaboration with EXPERTOX Laboratory in Paris and the Molecular Chemistry laboratory (LCM) part of the Chemistry Department of the Ecole polytechnique . During 3 years, she learned to use different types of mass spectrometers and developed her skills in validation methods and quality control of cosmetic emulsion. Enriched by her previous experiences, she now has a global vision of the parameters necessary for the evaluation of cosmetic products ranging from chemical, physical and microbiological analyzes, to monitoring the quality control from conception to sales. Since 2018, Ségolène has been the R&D manager at EXPERTOX Laboratory.