The role of universities as drivers of good practices and learning has changed radically in recent years. The strategic plan of the Comillas Pontifical University establishes the obligation of a learning and service subject in all degree programs as a way to put what has been learned during the university years at the service of society and as a vehicle for promoting the Sustainable Development Goals set by the 2030 Agenda. In this article we will present the theoretical framework on which the project has been developed, including the university context in which it fits, to analyze the process of design and implementation of a service-learning course in engineering degrees, selecting as case studies two examples of projects in which the social impact was high. As conclusions we will present the strengths and weaknesses of the implementation process, as well as the students’ learning based on their experiences.