Dr. Clark is a member of the Navajo Nation and was born and raised in Albuquerque, New Mexico. She received her Bachelor of Arts degree in Psychology with a minor in Alcohol and Drug Studies from Loyola Marymount University in Los Angeles and her Ph.D. in clinical psychology with an emphasis in multicultural community clinical issues from the California School of Professional Psychology in Los Angeles in June 1998. Dr. Clark's dissertation was on the "Multicultural Life Styles of Urban American Indians Living in Los Angeles County". She is a licensed psychologist and the Administrative Clinical Director for United American Indian Involvement, Inc.'s Robert Sundance Family Wellness Center, which is a substance abuse treatment program for American Indians residing in the State of California. Dr. Clark sits on numerous boards in the local, state, and federal level advocating on behalf of American Indian issues including the Los Angeles City/County Native American Indian Commission, the Children's Planning Council, the Indian Health Service Youth Regional Treatment Center Task Force (YRTC), and the National Indian Education Association. She serves as the urban representative on the YRTC Task Force. She is involved in administration, program development, research, teaching, and direct services for the American Indian community.