Montesinos got his PhD at Observatoire de la Côte d’Azur, Francia, working on the evolution of the accretion discs  around black holes. His current research focuses on understanding and modeling the physics of gas and dust disks around young stars (protoplanetary disks). An important part of his work is to create a bridge between theoretical models and real observations of these objects, such as those obtained by ALMA.

Currently, Matias is academic in the Department of Basic Sciences at Universidad Viña del Mar, Chile.