About Us

Dr. Mark Hammerly, Ph.D.

He graduated from Ohio University in 1996 with a Bachelor’s in Psychology and from University of Dayton in 1999 with a Master’s in Clinical Psychology.  He received his Ph.D. in Psychology from Miami University in 2004 with a focus on rehabilitation of individuals with acquired or congenital neurological and developmental brain dysfunction.  He has over 10 years of experience working with children and adults providing psychological evaluations, diagnosis, and treatment recommendations as an expert in disability assessment for the Ohio Court System, Rehabilitation Services Commission, State of Ohio Social Security Administration, and Bureau of Disability Determination.

Mary-Ellen Fleming, MSW, LSW

Mary-Ellen Fleming received her Master’s in Social Work from The Ohio State University in 2003 and has been a Licensed Social Worker in the State of Ohio since 2003.  She received her Bachelor’s in Psychology from Otterbein University, Westerville, Ohio in 1999.  She began working as an ABA Therapist for several families in Central Ohio in 2002 before joining Dr. Hammerly and Associates, Inc. as Dr. Mark Hammerly’s ABA Consultant in 2005.  Mary-Ellen oversees in-home ABA Therapy implementation, behavior training, social skills group, vocational skills training, and provides school consultations on behalf of Dr. Mark Hammerly.

Dr. Lindsay Fletcher

Dr. Lindsay Fletcher graduated from The Ohio State University in 2011 with a PhD in School Psychology and she completed her post-doctoral studies in Autism Spectrum Disorder.  She has been working with children with Autism since 2005, and she has worked in several different school settings as a school psychologist.  Dr. Lindsay Fletcher works with teenagers 15 years old and older to help them learn the vocational skills and independent living skills necessary to successfully transition into young adulthood. She can perform psychological evaluations, diagnosis, and treatment recommendations for teens 15 years old and older.

Carrie Barrie, MSEd, BCBA

Carrie Barrie graduated from The Ohio State University in 2014 with a Master’s in Education and a degree in Behavior Analysis.  She has been working with children with Autism as a Lead ABA Therapist since 2006 and she has worked in several schools for children with Autism as a Special Education Teacher.  Carrie oversees in-home ABA Therapy implementation, behavior training, and provides school consultations on behalf of Dr. Mark Hammerly.  In December of 2014, Carrie passed and became a Board Certified Behavior Analyst.

Jill Young, MA

Jill Young received her Bachelor’s degree in Psychology in 2004 and Master’s degree in education in 2007 from The Ohio State University and is a Licensed Intervention Specialist for children and young adults. She began working as an ABA Therapist in 2001 and worked in the Disability Advocacy field before becoming an Intervention Specialist in 2008. Jill has worked for the past 6 years as the Lead Teacher in Elementary School Classrooms for students with Autism Spectrum Disorders in two Ohio school districts. Jill oversees in-home ABA Therapy implementation, Behavior Interventions and Training, provides Educational Training and Assessments, facilitates Social Skills Training and provides School Consultations and IEP support on behalf of Dr. Mark Hammerly.