Dr. Parker has been employed in clinical, school, university and informal settings. Most recently Dr. Parker was the principal and clinical director at a school for children from 6 weeks to 21 years of age, with developmental challenges. Since 2002, Dr. Parker has been the head psychologist at Keller Clinic where he specializes in offering comprehensive psychoeducational evaluations and the diagnosis and treatment of children with Autism Spectrum Disorder, ADHD, and learning and developmental disorders. Dr. Parker believes that treatment is most effective when there is a cooperative partnership of child, family and school.