Alejandra Casillas, MD, MSHS, is an associate professor of medicine at the UCLA David Geffen School of Medicine, a primary care physician, NIH-funded scientist, and community advocate. The daughter of Mexican immigrants, she draws on lived experience to address health inequities. A first-generation college graduate, she studied at Harvard College and Harvard Medical School, then completed residency and served as Chief Resident at UCSF. After a Robert Wood Johnson fellowship and public health training at UCLA, she worked in Switzerland on immigrant health. Since joining UCLA in 2016, her research and leadership focus on advancing equity, diversity, and inclusion in underserved communities.