Belen Vargas joined the Weingart Foundation in 2000 as a program associate, where she responsible for managing the foundation's Small Grants Program. She has since been a program officer, associate vice president for grant operations, and now serves as vice president for grant operations where she is responsible for the management of all grantmaking programs and staff. Prior to joining the Weingart Foundation, Belen spent nearly eight years working at a number of Los Angeles County nonprofit legal service organizations.