Meet The Team

Rachel Kittenbrink


Director of Pittsburgh Behavioral Services 

Dr. Kittenbrink received her master’s degree in Special Education from Vanderbilt University and Ph.D. in Special Education from The University of Pittsburgh. Recently, Dr. Kittenbrink served as an educational consultant and behavior analyst with the PaTTAN Autism Initiative and as an adjunct professor for the University of Pittsburgh, teaching courses in special education and applied behavior analysis. Her research interests include peer-to-peer mand training and peer support programs. Kittenbrink has served as an editorial reviewer for RPSD, and has developed a passion for serving diverse populations through almost 20 years of experience in direct care, administrative, teaching, and consultative roles.

Kittenbrink's various experiences have allowed her to work with a wide range of ages (birth through adulthood) and supporting a wide array of learning needs (individuals with autism, learning disabilities, intellectual disabilities, and emotional disorders). Kittenbrink serves as a volunteer coordinator for the One-to-One Special Needs Ministry at Allegheny Center Alliance Church and provides consultation, training, and professional development services to the South East Asia Prayer Center for The Chinese American International Cooperation Training for Children with Autism project.

Photo Sep 21, 13 29 57.jpg

James Miller


Supervisor of Pittsburgh Behavioral Services 

Jim received his master’s degree in Education from Arizona State University. Before joining PBS in June of 2018, Jim worked as a behavioral analyst and administrator at a private school for students with autism. In addition to working with learners, Jim has a passion for employee training and development. 


Abigail Ubinger


Abbey received her Master of Arts in Elementary Education and Special Education, as well as a Bachelor of Multi-Disciplinary Studies from West Virginia University. She also received her BCBA in November of 2017. Abbey has always had a passion for working with children diagnosed with Autism. She started working with children diagnosed with Autism in high school, and after receiving her degree, began teaching and directly servicing students. Abbey has been employed in several classrooms that participated in the PaTTAN Autism Initiative teaching students various skills ranging from language skills to daily living skills. Abbey has been a team member of PBS since July of 2017. Aside from teaching and servicing children directly, her passion is to help families in any way possible. 

Bio Pic PBS_edited.png

Brittney Stonestreet

M.Ed., ABA Instructor 

Brittney attended Gettysburg college and earned her bachelor’s degree in Music in 2012.  She hopes to graduate December 2019 with a Master’s in Education in Early Intervention with Autism Specialization and Applied Behavior Analysis at the University of Pittsburgh.  Prior to moving to Pittsburgh in 2016, Brittney worked as a Lead Preschool Teacher in the Washington, D.C. area and has over 10 years of experience working directly with children with autism spectrum disorder.  She is ecstatic to be a part of the PBS team and is looking forward to learning and growing as a behavior technician. 


Caitlin McMaster

M.Ed., ABA Instructor

Caitlin has a Master’s Degree in Education from The University of Pittsburgh.  She began her career in Denver, Colorado as a Special Education Teacher within an alternative school.  In this setting, she worked with students with various social, emotional, and cognitive disabilities. Caitlin moved back to Pittsburgh to focus her career within the field of ABA.  She joined PBS in August 2019, and is currently completing coursework to become a Board Certified Behavior Analyst.


Cody Webb


Cody Webb attended Robert Morris University and earned his bachelor’s degree in psychology in 2011. He then completed a Master’s program through Arizona State University in Curriculum and Instruction with a focus in Applied Behavior Analysis in 2014. He has worked in the field of special education since 2009, in both face to face and cyber school settings. In 2017, Cody passed the board exam to receive his BCBA. 

Cody and his wife, Ashley, live in Pittsburgh with their dog, Rory. He enjoys going camping and playing basketball during his free time. He’s also looking forward to continue learning and growing from the individuals he works with and his experiences in the field. Cody is happy that he has the opportunity to help others to improve and develop new skills on a daily basis.

Photo Sep 21, 13 50 36.jpg

Hannah Shirey 

ABA Instructor

Hannah began working as a behavioral therapist at the Kristin Farmer Autism Center in 2013, and in 2015, she graduated with a B.A. in Speech and Hearing Sciences at the University of North Texas. She moved to Pittsburgh in 2016 to pursue her educational and career goals in the field of ABA. She is currently a graduate student at the University of Pittsburgh focusing on early childhood intervention, Autism Spectrum Disorders, and Applied Behavior Analysis. She began working at PBS in August 2018, and she is looking forward to growing as a behavior technician through her experience gained with the incredible staff here.


John Susi

M.Ed., ABA Instructor

John received his Master’s degree in Education with a specialization in School Counseling from Indiana University of Pennsylvania in 2014.  He also earned a Bachelor’s degree in Psychology from La Roche College. John spent several years working in various school districts, first as a paraprofessional and then as a school counselor at both the primary and secondary levels.  Prior to being in a school setting, he spent time working as a youth minister and also worked as a residential advisor in a residential treatment facility. He has also spent time volunteering as a group facilitator at the Highmark Caring Place for grieving children and families.  John is very excited to start this new chapter working with new children and families, and having the opportunity to learn from all of his amazing co-workers.

Photo Sep 21, 15 41 51_edited_edited_edi

Kaity Slack-Hanna


Kaity received her bachelor’s degree in Psychology from West Virginia Wesleyan College and her master’s degree in Education in Applied Behavior Analysis from The University of Pittsburgh. She began her career working at a private clinic in West Virginia, where she discovered her passion for serving children with developmental and intellectual disabilities and their families. 


Latisha Humphries

M.Ed., ABA Instructor

Latisha has a Master’s Degree in Special Education from Northern Arizona University along with a Positive Behavior Support certificate and a Bachelor of Science in Instructional Studies from Point Park University. She joined PBS in October 2018. She has ten years of experience working with a wide range of students in the Pittsburgh Public Schools as a Paraprofessional and 6 years of experience working  directly with students on the autism spectrum

Photo Oct 19, 14 12 29.jpg

Xiaohan (Han) Chen

M.Ed., ABA Instructor

Han is a Phd candidate in the Special Education program at Duquesne University. Her research interests include: early intervention for children with autism using applied behavior analysis, special education advocacy for immigrants in US, and professional development for teachers of children with autism. She joined PBS in January 2018 and enjoys her job as a behavior technician. Han is also actively involved in research and teacher training in the field of special education in China.

531 5th Street 

Oakmont, PA 15139 

412-329-8385 (Intakes/Insurance)

724-393-0093 (Clinic)