The PPIA Fellowship Junior Summer Institute (JSI) Program is a fully funded and rigorous graduate school preparation program for undergraduate juniors committed to public service careers. The program was started to address the lack of diversity across the spectrum of professional public service, including government, nonprofits, public policy institutions, and international organizations. The purpose of the fellowship is to prepare students to obtain a graduate degree in public policy, public administration, international affairs, or a related field.

The six-week Junior Summer Institutes take place at top public policy graduate schools across the US. Once students have completed their JSI, they join an alumni network and have access to mentoring and career development opportunities as well as financial support for graduate school at programs in the PPIA Graduate School Consortium.