Compassionate Care Grounded in Science
Mahr Therapeutic Services is a BCBA-owned ABA practice serving children, individuals, and families across Northern Virginia. We believe every person deserves therapy that is evidence-based, individualized, and delivered with dignity — and we build every program around that belief.
Meet Nidda Mahr, BCBA —
Founder & Clinical Director
Nidda Mahr is a Board Certified Behavior Analyst with 8 years of professional experience in Applied Behavior Analysis (ABA) and 14 years of combined leadership in healthcare. With 18 years of personal experience supporting individuals with autism and developmental delays, Nidda brings both professional expertise and compassionate insight to the families and individuals she serves.
Nidda specializes in developing individualized treatment plans, supervising clinical teams, and collaborating with families, schools, and interdisciplinary providers to support meaningful progress and improve quality of life. She is dedicated to ethical, evidence-based care and committed to maintaining high clinical standards while fostering supportive environments that encourage growth, independence, and success.
Passionate about education and professional development, Nidda provides training and mentorship to graduate students pursuing BCBA and BCaBA certification, as well as ongoing training and support for Registered Behavior Technicians (RBTs). Through leadership, mentorship, and clinical supervision, she is committed to helping develop the next generation of ABA professionals.
Nidda earned her Master of Science in Psychology with a specialization in Applied Behavior Analysis from Capella University and maintains certification through the Behavior Analyst Certification Board. Her professional approach combines clinical expertise with empathy, professionalism, and a commitment to lifelong learning within the field of behavioral health.
Outside of her professional work, Nidda enjoys hiking, traveling, and diamond painting, while continuing to pursue ongoing growth and education within the ABA field.
Our Mission & Values
Evidence-Based Practice
All treatment is rooted in the science of ABA
Compassion
Every child and family is treated with dignity, empathy, and respect
Individualization
No two plans are the same; every program reflects the child's unique needs
Family Partnership
Caregivers are active participants, not bystanders
Our Approach
Therapy That Respects the Whole Child
At MTS, we practice assent-based ABA — a model that prioritizes your child's comfort, engagement, and voice throughout the therapeutic process. Sessions are play-based and naturalistic, taking place in the home and community settings where children are most at ease and where skills transfer most naturally into daily life. Nidda provides in-person supervision for every client, so you can trust that the oversight behind your child's program is consistent and clinically sound. And because we believe caregivers are essential to lasting progress, parent coaching is woven into the work from the very beginning.
"We don't just work with children. We partner with the families raising them."
Serving Families Across Northern Virginia
We work with children and individuals across a wide range of needs — with a special focus on ages 3–14 and skills such as communication, social development, self-regulation, and daily living.
City of Alexandria
Fairfax County
Loudoun County
Prince William County
Arlington County
Fairfax City
Reach Out to MTS Today
Whether you're a family seeking support or a provider looking to refer a client, we look forward to connecting with you.