Currently working at the CEA Paris-Saclay institute, I'm involved on a neutrino experiment called STEREO. This experiment aims at searching for a new oscillation pattern on the neutrino spectrum at very short baseline as a direct test of the existence of a sterile neutrino. My work mainly consists in data analysis and estimation of systematic errors. I plan to defend my thesis in October this year and start looking for post-doctoral position. Beside my main research field on neutrino physics, I've been involved in the emergence of the activity on the LISA projet (gravitational waves detector) in my institute. Please find below a summary of my main contributions during my PhD.