In February 2003 she founded the University Institute for Community Development (UICD), which has impacted over 75 communities around the archipielago of Puerto Rico with the aid of 13 professors and 150-200 students from over 20 disciplines from the arts and sciences. This is done through the participatory action research method, which consists of going to disadvantaged communities close to where students live and work with the residents to increase their quality of life. An example of this is the design and construction of a community-owned aqueduct in Maizales, Naguabo. These experiences not only aid students in forming themselves, but also in preparing them for adult life as well as it being noted in their transcript as an investigation course. Through the UICD, Seijo collaborated with students from the Lyle School of Civil Engineering at Purdue, through their EPICS program, to develop a new community water system in Humatas, Añasco. The involvement of engineers also ranges from "nutritional and agricultural programs" to "support to [the] elderly and children organizations." After Hurricane María, the Institute received a grant from the Puerto Rico Relief Fund of South Central Wisconsin to make the community of Guayabota, Yabucoa sustainable in terms of food, electric power and plumbing. After the Hurricane, so many material donations came in that she had to store them in her office.