Our Team

Carol McLean, Ph.D.
Licensed Psychologist

Dr. McLean founded Developmental & Educational Psychological Services over 20 years ago in order to provide individuals and their families the best of both clinical and educational psychological services in a private setting. She is committed to providing the highest quality of psychological assessments. She collaborates with schools, psychiatrists, neurologists, pediatricians, surgeons, and other mental health providers to help individuals access the services and interventions needed in order to reach their full potential.

Dr. McLean graduated from Indiana State University in 2001 with a Ph.D. in Psychology. She is a licensed psychologist specializing in psychological assessment from birth throughout the lifespan. She specializes in numerous developmental disabilities including Autism Spectrum Disorder, Attention Deficit Hyperactivity Disorder, and Specific Learning Disabilities. In addition, she specializes in medical clearance evaluations for bariatric patients and pain patients.

Dr. McLean is a member of the National Register of Health Service Psychologists. The National Register has stringent requirements for education, internship and experience as a health care professional in order to qualify for membership. Dr. McLean is a member of the American Psychological Association, Arizona Psychological Association and is the former President of the Scottsdale Psychological Society.

Jessie Marshall, MAS, BCBA, LBA
Licensed Board Certified Behavior Analyst

Jessie is a licensed Board Certified Behavior Analyst in Gilbert, AZ. As the Executive Director of ABA Services at DEPS, she oversees all clinical assessment, programming and training. Jessie received her undergraduate degree in Psychology from the University of Arizona with an emphasis in Research, her Master’s degree in Infant Family Practice from Arizona State University, and completed her behavior analytic coursework through Florida Institute of Technology.

As a BCBA, Jessie has provided clinic-based services for children under 5, developed an inclusion preschool program for children with and without disabilities, created a virtual-based social skills group for school-age children during the COVID-19 pandemic, partnered with private educational facilities to assist school personnel in improving student learning environments, overseen parent training programs for families receiving behavioral health services, presented at Association for Behavior Analysis International (ABAI) on client outcomes, and serves as co-instructor for ASU’s Masters of ABA online program.

Jessie’s professional interests include supporting and identifying developmentally appropriate treatment outcomes, compassionate care for families, quality assurance monitoring, and prioritizing neurodivergence in her practice. Jessie has spent over 15 years specializing in the specific needs of children ages 0-5 and aims to create programs her own toddlers would enjoy.

Kate Horner, MS, BCBA, LBA
Licensed Board Certified Behavior Analyst

Kate is a licensed Board Certified Behavior Analyst in Tempe, Arizona. As a BCBA at DEPS, Kate conducts clinical assessment, treatment planning and programming, and training of staff and technicians. Kate received her undergraduate degree in Psychology with a minor in Early Childhood Education as well as her Master of Science in Applied Behavior Analysis from Arizona State University.

Kate’s clinical experience includes home- and clinic-based therapy for individuals ages 2 – 5, prioritizing the development of foundational learning skills and fostering independence. Kate is focused on providing individualized, neurodiversity-affirming support using naturalistic and play-based therapeutic strategies.

Mimi Nguyen, MS
Director of Operations

Mimi is the Director of Operations at DEPS Autism. She has worked in early intervention as a service coordinator for the past 10 years. Her bachelor’s degrees are in Family & Human Development and Psychology from Arizona State University (ASU). In 2018 she graduated with a master’s in Family and Human Development.

Her passion is in working with children in various capacities. Mimi comes to DEPS Autism with extensive knowledge in early childhood development, excellent organizational skills, managerial and supervisory experience, and a passion for working with the community.

She is bilingual and has done informal interpretation for the Vietnamese community. When she is not helping run our office, she is busy reading through the local library’s book collection.