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Our Team

Dr. Bonnie Headington, Clinical

Bonnie Headington, Ph.D.

Bonnie Jay Headington, Ph.D. worked with her first child with autism while in graduate school many years ago, and has maintained her passion for serving this population ever since and pursued becoming a specialist in this area. She received her doctorate from Ohio University and is a licensed psychologist and licensed specialist in school psychology in both California and Texas. Dr. Headington has served in a variety of settings over her career including: public schools, private counseling, institutional settings and human services, and began working with Spectrum of Hope in 2006. Her current position entails monitoring client progress, providing diagnostic evaluation services, consulting with behavior treatment teams and providing staff trainings as needed.
Dr. Headington is a life member of the American Psychological Association, a past member of NOVA (served in response to 9/11) and is the author of a counseling textbook and a book on grief. In addition to her work at Spectrum, she maintains a small private practice.

Dr. David Nash, Clinical

David Nash, Ph.D.

David Nash, Ph.D. is a licensed psychologist who first began working with children on the autism spectrum in 1996 while completing his pre-doctoral internship with Spring ISD. In 1998, he moved to Hawaii and began providing in-home services to individuals with autism while working to complete his doctorate degree in clinical psychology from the California School of Professional Psychology in San Diego, California. He was employed by Spectrum of Hope in 2015 as a psychologist to provide evaluation, counseling, observation, and consultation services for clients across all programs within the company.
David is an active member of the American Psychological Association. He has a part-time private practice where he provides a wide variety of services including diagnostic evaluations and counseling for children, adolescents, adults, and families affected by autism.