Marissa Guerrero joined the Packard Foundation in June 2019 as a Program Officer in the Organizational Effectiveness team. At the foundation, she manages organizational development grants for Population & Reproductive Health and Agriculture, Livelihoods, and Conservation grantees.

Prior to joining the Foundation, Marissa was a director at Arabella Advisors, where she partnered with foundations and their grantees to build on their core strengths and maximize their impact. Marissa led work focused on strategy development, operational planning, and evaluation capacity building. She also conducted research and advised clients on leadership program development and evaluation.

Marissa has nearly a decade of experience working in non-profit advocacy organizations on behalf of children, youth, and young adults in foster care. As Resource Development Manager at California Court Appointed Special Advocate (CASA) Association, a statewide hub for nearly 50 CASA programs, she led fundraising, volunteer and staff training, and program monitoring.

Prior to working in the non-profit sector, Marissa conducted research at the University of Chicago focused on reproductive rights and racial equity in the United States. As part of the original research team on the Black Youth Project (now GenForward), Marissa developed and disseminated research about young people’s attitudes and behaviors, particularly related to gender norms, sex, and sexuality.

In her spare time, Marissa serves as president of the board of California Youth Connection, a youth-led advocacy organization working to transform the foster care system through legislative, policy, and practice change. She also volunteers with Horizons Foundation, the Bay Area’s LGBTQ+ community foundation, as a program committee member who advises the foundation board on program strategy and priorities. Marissa holds a Master of Arts and PhD in Political Science from the University of Chicago and graduated magna cum laude in Political Science and Women’s Studies from University of California, Los Angeles.

[javascript protected email address]