Arnaud Landragin is research director at CNRS and director of the laboratory SYstèmes de Réference Temps-Espace, a mixed unit of research between Observatoire de Paris – Université PSL, CNRS and Sorbonne Université. Doctorate in Physics in Institut d’Optique in 1997, he started his research activities in atom interferometry during his post-doctoral fellow in Yale University. He joined CNRS in 1999, in SYRTE laboratory, where he started his own group in atom interferometry in order to develop inertial sensors. His research activities have been focused first on the demonstration of an inertial base for navigation including gyroscopes and accelerometers, gravimetry for application in geophysics and test of fundamental physics in space. His interests have been extended to the development of atom interferometers with trapped atoms.