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Dr. Diego Casillas, OTD, OTR/L is an occupational therapist with over ten years of experience working in both schools and clinic settings. Diego received his Doctorate in Occupational Therapy from Creighton University. He is certified in Sensory Integration, including administering and interpreting the Sensory Integration and Praxis Tests. Dr. Casillas. He has co-authored articles in peer reviewed journals in topics such as a critical analysis of sensory integration from a non-linear (Dynamic Systems Theory) perspective. He has conducted and published research in the American Occupational Therapy Association’s Special Interest Section on teachers’ perspectives of school based occupational therapy consultation services. Dr. Casillas has presented on topics such as Dynamic Systems Theory and its application to Occupational Therapy Assessment and Interventions, and Motor Control/Motor Learning, and Handwriting Assessment/ Interventions to occupational therapy graduate students at multiple universities.


In his practice, Dr. Casillas utilizes Dynamics Systems Theory, among other theoretical frameworks, to address sensory processing difficulties in children with ADHD, and/or autism spectrum disorders.  He has used this approach to collaborate with transdisciplinary teams to address self-regulation, self-management, sensory needs, and occupational and academic dysfunction in a holistic and comprehensive manner. Using this approach has allowed Dr. Casillas to use his related training in, sound-base therapies (Therapeutic Listening), self-regulation (The Alert Program), practical strategies for working with children with autism spectrum disorders and ADHD, assistive technology, visual perception, handwriting strategies, and sensory integration, to effectively facilitate positive change in his clients.