Marian Williams is a licensed psychologist specializing in infant-family and early childhood mental health and developmental disabilities in children. She is Co-Director of Interdisciplinary Training for the USC University Center for Excellence in Developmental Disabilities (UCEDD), and Autism Training Coordinator for the California Leadership Education in Neurodevelopmental Disabilities (CA-LEND) interdisciplinary training program. Based at Children’s Hospital Los Angeles, Dr. Williams leads the Early Childhood Mental Health program and the recently launched Stein Tikun Olam Infant-Family Mental Health Initiative. Dr. Williams leads a Birth to Five Mental Health Training project providing core training to early childhood mental health professionals throughout Los Angeles County, and leads the Training and Technical Assistance project for First Connections, a three-year project funded by First 5 LA to enhance developmental screening and linkage for young children from underserved communities. She conducts research on diagnosis and assessment of autism spectrum disorders, access to care for young children with developmental disabilities, and development of bilingual children.