SI aims to promote human and social development in disadvantaged communities by creating solidarity networks. It is made up of professors, researchers, students and collaborators linked to the UPM Schools of Roads, Aerospace and Architecture.

Its lines of work include humanitarian projects, teaching projects, collaboration with universities in developing countries through teacher training courses, collaboration with universities in developing countries through End of Master and End of Degree Projects, construction projects , Supply and sanitation, and the creation and start-up of the Di SI volunteer school.