About Us

KFAC Staff

The UNT Kristin Farmer Autism Center staff is a family of dedicated, compassionate, and caring individuals, selected for their extensive knowledge and experience in autism, and their demonstrated success in a wide variety of professional areas.

Every staff member and employee strives to be a model of excellence in all we do, including our daily interactions with one another, the children and families we serve, and the many partners and collaborators who make up our multidisciplinary team.  We maintain the highest levels of skills and competence in autism treatment, research, and training, in order to fulfill our vision and accomplish our mission goals and objectives.

We continuously demonstrate the Center's Core Values, and we pledge to make a positive long-term impact on the lives of our clients.  We believe that by significantly improving the functional skills of your child, we not only enrich their lives, but also our lives and the lives of those in our shared community.

We truly consider all persons receiving services at the Center to be part of our extended family, and vow to conduct ourselves  at all times in an atmosphere of utmost professionalism, courtesy, mutual respect, determination, and hope.

Please discover more about the UNT Autism Center team below.


Kristin Farmer

Kristin Farmer - Benefactor and Strategic Advisor

Ms. Farmer is the UNT Kristin Farmer Autism Center's benefactor.  She continues to be an active supporter of UNT and the University's many autism activities, including the center which proudly bears her name.

Kevin Callahan

Kevin Callahan, PhD - Executive Director

Center director Kevin Callahan, PhD, served as a UNT faculty member in the educational psychology department’s special education program for 18 years before becoming the director of the UNT Kristin Farmer Autism Center.

Dr. Susan Nichols

Susan Nichols, PhD, BCBA-D - Associate Executive Director

Dr. Nichols received her PhD from UNT in the area of Special Education/Autism Intervention and has over 10 years of experience in the field of special education and autism intervention prior to serving as the Director of Intervention for the UNT Autism Center.

Shannon Field

Shannon Field, MEd, BCBA - Intervention Coordinator

Shannon joined the Kristin Farmer Autism Center in June 2014.  She is a certified Special Education Teacher and General Education Teacher with over 8 years of experience providing services for children with autism in both public school and clinical settings.

Jason Cohen, MS, BCBA - Intervention Coordinator

Jason has experience in single-subject research, various methods of instruction, staff training, and program management, design, and implementation and has over 10 years of experience providing behavior analytic services in schools, homes, research, and clinical settings.

Karen Toussaint

Karen A. Toussaint, PhD, BCBA-D - Intervention Coordinator, Assistant Professor of Behavior Analysis

Dr. Karen Toussaint is an Assistant Professor of Behavior Analysis at the University of North Texas. Dr. Toussaint provides behavioral intervention services for children with autism at KFAC and specializes in the treatment of severe behavior disorders and early language acquisition. While at KFAC, she also conducts research evaluations related to improving clinical outcomes.

Kristi Klusman

Kristi Klusman - Intake Coordinator

Kristi Klusman joined the Kristin Farmer Autism Center in November 2014, where she serves as the Intake and Administrative Coordinator as well as overseeing the Center's community outreach.

Melanie Litvin

Melanie Litvin, MS, BCBA - Intervention Coordinator

Melanie joined the Kristin Farmer Autism Center in October 2014. She earned her bachelor’s and master’s degrees in Behavior Analysis at the University of North Texas, and has over four years of experience working with children with autism in both clinical and school settings.

Collin Massey

Collin Massey, MEd, LPC-Intern - Mental Health Counselor

Collin Massey has been working with children and adults with autism for over ten years. He is a Licensed Professional Counselor-Intern in the state of Texas and earned his Master's degree in Community Counseling from the University of North Texas. Collin has counseling experience with individuals, couples, families, and groups in a variety of settings, including community agencies, schools, churches and private practice.

Kimberlee Flatt

Kimberlee Flatt, MA, LPC, BCBA - Intervention Coordinator, Adult Services

Kimberlee Flatt is a Licensed Professional Counselor and a Board Certified Behavior Analyst currently working towards her doctoral degree in Autism Intervention though the department of Educational Psychology. She has 10+ years supporting public education through a variety of roles. She is certified as a Special Education Teacher, General Education Teacher, School Counselor, and Administrator.

Dawn Towne

Dawn Towne - Administrative Specialist

Dawn Towne joined the KFAC team in October 2015. She serves as an administrative specialist responsible for conference planning and reception area support.

Mary-Ellen McComb

Mary-Ellen McComb - Administrative Coordinator

Mary-Ellen has a varied background in software support and training, office administration and human resources.