Recent Yale alumnus Jarrad Aguirre relates his experience creating MAS Familias, a campus organization that supports Latino/a undergraduates studying math and science. Alarmed by Latino/a students' academic struggles and the lack of Latino/a role models in the fields of math and science--and increasingly aware of the social benefits of a diverse scientific work force--Aguirre built MAS Familias to promote dialogue, offer support, and improve persistence for Latino/a undergraduates in math and science departments. Aguirre calls on undergraduates to work together across institutions, to work with youth to build strong networks of budding Latino/a scientists, and to share their stories, as he has done, in an effort to promote change.