Chad Shultz - RBT

Chad's career initially started with being a specialty welder working with uncommon metals to build water towers, pipelines and the like.  For the last 4 years, he has been a home caregiver for a disabled Marine veteran, and had been involved with Special Olympics for 2 years. When his daughter was diagnosed with Autism, his focus turned toward helping children learn and succeed.  Chad loves the rewarding feeling he experiences when he works with our clients.  Chad is a Registered Behavior Technician and plans to pursue a Masters degree in Behavior Analysis.

​Meet Our Staff

Brittany Littrell - RBT

Brittany has over 2 years experience in the medical field teaching children with special needs ranging from preschool to high school in a pediatric care setting.  In this setting, Brittany both designed curricula and implemented discrete trial teaching. She also has training in speech and language pathology. Brittany graduated with a double major as a Bachelor of Psychology and Language Skills from Liberty University in 2016.  Brittany is a Registered Behavior Technician and plans to further pursue her certification in behavior analysis. 

Lauren Reynolds - RBT

Lauren has been involved with the Special Olympics for 4 years, which ignited her passion for working with children.  She was also a swim instructor working with children for 6 years.  Lauren received her Bachelors of Psychology from Florida Southern College in May 2016. She is a Registered Behavior Technician and plans to pursue her Masters degree in the field of behavior analysis.

Christine Roeper - BCaBA

Christine received her BA in Psychology in December 2013 from the University of South Florida, and has been working in the field of behavior analysis since 2014.  She is currently working towards her masters degree in behavior analysis at the University of South Florida.

Amy Morris - BCaBA

Amy received a Masters of Education from the University of Florida, and was working as an adult therapist in a community mental health center early in her career.  She then began working as an ABA therapist before becoming certified in behavior analysis.  Her passion and commitment to children frames her work.  Amy has over 9 years experience in providing one-on-one ABA therapy, parent behavior support, and school consultations in and around Polk County. She is currently pursuing a BCBA certification.

Thianna Diamandis - BCaBA

Assistant Clinical Director 

Thianna received a Bachelors of Arts in Psychology with a minor in Behavior Analysis from the University of South Florida in 2014.  Thianna is currently pursuing a Masters in Applied Behavior Analysis from Capella University.  Thianna is a Board-Certified Assistant Behavior Analyst and has more than 5 years of experience in behavior analysis.

Marlene Wlodawski - Support Staff


Carrie Shriner - BCBA

Carrie first performed ABA therapy at the age of 19, where her primary focus, along with teaching language and appropriate behaviors, was to help acclimate a young boy with Autism into various community experiences.  She then went on to become an ESE teacher, before returning to the field of behavior analysis and pursuing a Masters of Science in ABA from the Florida Institute of Technology.  She has consulted with a local private school to design and implement an academic curriculum along with behavioral support for children with special needs.  Carrie has extensive experience in servicing children in and around Polk County in centers, schools and homes.  

Emily Berry - RBT


Emily is from Paris, TX, and moved to Lakeland in May 2017.  She graduated with a Bachelors Degree in Child Life from Harding University in Searcy, Arkansas in 2016.  Before Emily joined the Trek team, she had been working with a child in the school setting as a behavior therapist for one year.  She has four years of experience working with children in a variety of settings, including summer camps, infant daycare, classrooms and preschools.

Danica Ivancevich - RBT

Danica received a Bachelors of Science in Psychology and Criminology from Florida Southern College in 2012.  She then went on to pursue a Masters of Science in Forensic Studies with a concentration in Behavior Analysis from Florida Gulf Coast University in 2015.  Danica is a Registered Behavior Technician and has over 5 years of experience in behavior analysis.