About Us

ABA Autismus Therapie Düsseldorf GmbH was founded in 2017 to serve the growing need for Applied Behavior Analysis treatment services in Germany. We are dedicated to improve the lives of children and their families. 

We are a team comprised of Behavior Analysts and Co-therapists represented in the cities of Düsseldorf, Munich and Frankfurt. ABA ATD is committed to providing personalised ABA programs for children touched by autism spectrum disorder and/or learning or behavior difficulties.

The founder, Mr. Rodrigo Pellet Lastra, is a Clinical Psychologist, Board Certified Behavior Analyst (BCBA) and father of a child with autism.

When his son was diagnosed with autism, Mr. Pellet Lastra, already a psychologist with 20 years of experience, sought out the best possible therapy for his son; his research brought him to Applied Behavior Analysis (ABA).

After participating in several ABA workshops in Germany and Switzerland, Mr. Pellet Lastra decided to specialize in the treatment of autism-related developmental disorders using the ABA approach. Between 2011 and 2012 Mr. Pellet Lastra completed the Masters Program "ABA Interventions in Autism and Other Developmental Disabilities" at ABA-España, in Madrid, Spain. The Masters program is recognized by the Behavior Analyst Certification Board as an educational organization for certification as a behavior analyst.

In 2013, Mr. Pellet Lastra gained further experience in the treatment of autism through supervised participation in the "ABA Psicología Enséñame", Madrid, Spain, and the "Fundación Planeta Imaginario", Barcelona, Spain. Both institutions are leading ABA service providers in Spain.

From February 2014 to January 2017 Mr. Pellet Lastra worked at the Autism Therapy Center Rhein Wupper GmbH. In addition to his work as a therapist for children with ASD, Mr. Pellet Lastra supervised a team of therapists and co-therapists in developing and implementing ABA-based therapeutic interventions.

Mr. Pellet Lastra is a Board Certified Behavior Analyst (BCBA, Certificate 1-17-25238), recognized supervisor for prospective behavior analysts, BCaBAs (Board Certified Assistant Behavior Analysts) and RBTs (Registered Behavior Technicians), and a current member, and previously on the Board of Directors, of the German Association for Behavioral Analysis (ABA-D). 


Nicole (Nikki) Condit is a Board Certified Behavior Analyst (BCBA, Certificate 1-18-29226) and Partner of ABA Autismus Therapie Düsseldorf. She is also a recognized supervisor for prospective behavior analysts, BCaBAs (Board Certified Assistant Behavior Analysts) and RBTs (Registered Behavior Technicians). Nikki is a member of ABA International (ABAi) and she currently serves on the Board of Directors for ABA-Deutschland. ABA-D is the official German national association of the Association for Behavior Analysis International (ABAi).

She began working as a Behavior Therapist at The Wisconsin Early Autism Project (WEAP) in the fall of 2013 while attending the University of Wisconsin - Madison (USA). After receiving her Bachelor of Science in Special Education and her teaching license at a Special Educator (Wisconsin), she moved to Chicago to attend the Chicago School of Professional Psychology. While completing her Masters of Science in Applied Behavior Analysis (ABA), she worked for A.B.S. Behavioral Services as a Behavior Therapist. In July 2017, she moved to Düsseldorf and she is happy to apply her knowledge and experience in the field of ABA in her new adopted country.

Since 2015, Monika Sternau has been working together with children with autism and their families. Her focus has been on conducting home and community-based interventions, therapy, family consultations and education in Poland. In 2016, Monika received her Master’s degree in psychology at the University of Gdansk, Poland in Clinical Psychology. As a part of her studies, she gained a specialization in pedagogical preparation for Psychologists. In 2017, Monika graduated in Applied Behaviour Analysis studies accredited by the BACB at the University of Gdansk. Monika was born in Poland and she moved to Germany in June 2019. She is an associate member of Association for Behavior Analysis Deutschland - Deutsche Gesellschaft fur Verhaltensanalyse e.V.


Madeline Gehl is a Registered Behavior Technician (RBT, Certificate RBT-20-111442). She is trained as a Childcare Worker and has been working with children with autism for over 12 years. In addition to her work as an Integration Assistant in special education and regular education schools, in January 2016, she began a certification as an Education and Development Consultant and which she successfully completed in the summer of 2018. Additionally, she prepared to complete the RBT (Registered Behavior Technician) certification and passed in January 2020. Madeline, a German native, has been apart of our team since January 2018 and she has already made a very positive impact on our team and our clients!

Tabea Schick is a Registered Behavior Technician (RBT, Certificate RBT-20-117670).  In March 2018, she successfully completed her Bachelor of Arts in Educational Science in Magdeburg, Germany. During her studies, she worked as an Integration Assistant in a Special Education kindergarten where she gained valuable experience working with children with disabilities. Tabea is from Germany and lives in Ratingen. We have been proud to have her on our team since May 2018. 

Sina Thielen is a Registered Behavior Technician (RBT, Certificate RBT-20-129893) and has been with us since March 2020 as a Co-therapist in Training (Trainee). After her high school graduation, she volunteered in Scotland for a year where she assisted a teenager with ASD in the home, school and community. After her stay in Scotland, she continued to work with adults and children with disabilities. In the fall of 2017, she began her Bachelors in Social Work here in Düsseldorf. Sina is from Germany and lives in Essen. 

Linda Zheng completed her Bachelors in Clinical Medicine, and began her Graduate program in Educational and Developmental Psychology in 2019. At the same time she is preparing for her RBT-Exam.

Linda has been working with children since 2014, first as a language teacher, then as an integration assistant in school. During this time she has gained a lot of experiences in working with children. Linda was born in Germany, and speaks fluent German, English and Chinese. She has joined our team in October 2020 and works with our clients in the Frankfurt area.

If you are interested in joining our team, please send your documents by email to us at: