-About us-
The Team Behind Unwavering Support and Life-Changing Growth
Sierra Behavioral Therapy is a family-centered ABA practice dedicated to compassionate, evidence-based care. We work hand in hand with families to help individuals with ASD grow with confidence and independence.
The Team Behind Unwavering Support and Life-Changing Transformation
Sierra Behavioral Therapy is a family-centered ABA practice dedicated to compassionate, evidence-based care. We work hand in hand with families to help individuals with ASD grow with confidence and independence.
We believe therapy works best when it supports:
Communication and social interaction
Daily living and adaptive skills
Emotional regulation and learning readiness
Who We Are
Sierra Behavioral Therapy was created with one simple belief: therapy should feel personal and empowering for every family.
We understand that starting services can feel overwhelming. That’s why we focus on building genuine relationships first. We take time to listen, understand your goals, and design care that truly fits your child — not a generic program.
Our team combines clinical expertise with compassion, creating a safe and encouraging environment where children feel confident to learn and grow every day.
Our approach is always personalized, supporting growth while honoring each child’s individuality and pace.
1
Individualized Care
Every child is unique. Every plan is personalized.
2
Collaboration
We work hand in hand with parents, caregivers, and schools.
3
Compassion
We create a warm, respectful, and encouraging environment.
4
Integrity
We follow ethical, data-driven practices that deliver real results.
Our Mission & Values
To provide compassionate, evidence-based ABA therapy that helps children develop meaningful life skills and supports families every step of the way.
1
Individualized Care
Every child is unique. Every plan is personalized.
2
Collaboration
We work hand in hand with parents, caregivers, and schools.
3
Compassion
We create a warm, respectful, and encouraging environment.
4
Integrity
We follow ethical, data-driven practices that deliver real results.
Our Mission & Values
To provide compassionate, evidence-based ABA therapy that helps children develop meaningful life skills and supports families every step of the way.
Our Approach
We use Applied Behavior Analysis (ABA), a research-backed method proven to help children strengthen communication, social, and daily living skills.
But what truly sets us apart is how we help children with Autism
• Comprehensive assessments
• Individualized treatment plans
• Play-based and natural learning
• One-on-one support
• Continuous progress tracking
• Ongoing parent training
Because progress should happen not only in sessions, but at home, at school, and in everyday life.
Our Approach
We use Applied Behavior Analysis (ABA), a research-backed method proven to help children strengthen communication, social, and daily living skills.
But what truly sets us apart is how help children with Autism
• Comprehensive assessments
• Individualized treatment plans
• Play-based and natural learning
• One-on-one support
• Continuous progress tracking
• Ongoing parent training
Because progress should happen not only in sessions, but at home, at school, and in everyday life.
Meet Our Team
Our team of five dedicated professionals work together to provide consistent, high-quality, and personalized care for every family we serve.
Meet Our Team
Our team of five dedicated professionals work together to provide consistent, high-quality, and personalized care for every family we serve.
About
martha@sierrabehavioraltherapy.com
Hello and welcome to our online home. On this page you’ll meet the amazing people who make up the fabric of SBT and bring unmatched ABA care to our families.
Our approach makes the difference
If it means putting in extra hours, reading that file one more time, working around last minute changes, checking in emotionally and not just clinically – this team is on it. I am honored to lead them. I am humbled to be led by them, and full of gratitude towards the families who entrust us with their most precious asset- their children.
Built on trust and connection
At Sierra Behavioral Therapy, you are never, ” just a case”. To us, you are a family we stand behind with unwavering support. Our mission began with that promise, and it continues to guide everything we do.
Martha Sierra
CEO - BCBA
About
Hello and welcome to our online home. On this page you’ll meet the amazing people who make up the fabric of SBT and bring unmatched ABA care to our families.
Our approach makes the difference
If it means putting in extra hours, reading that file one more time, working around last-minute changes, and checking in emotionally and not just clinically—this team is on it. I am honored to lead them. I am humbled to be led by them and full of gratitude towards the families who entrust us with their most precious asset—their children.
Built on trust and connection
At Sierra Behavioral Therapy, you are never, ” just a case”. To us, you are a family we stand behind with unwavering support. Our mission began with that promise, and it continues to guide everything we do.
Martha Sierra
CEO - BCBA
About
robert@sierrabehavioraltherapy.com
Leadership & Operational Excellence
Hello. Robert, here! I consider myself incredibly blessed to love what I do and to share this journey with my wife, best friend, and the heartbeat behind SBT — Martha Sierra.
Systems, Performance & Support
My role at SBT is to support some of the smartest individuals I know by managing payroll, schedules, recruiting, and performance. Showing up to work every day is an adventure. Building a dream with my wife that changes lives, supports families, and makes a difference is more than I could have ever asked for.
Robert D Perez
Chief Operating Officer
About
robert@sierrabehavioraltherapy.com
Leadership & Operational Excellence
Hello. Robert, here! I consider myself the luckiest man alive because not only do I love what I do, but I am in love with who I do it with. My wife, my best friend, and the heartbeat behind SBT- Martha Sierra. She roped me into this gig because she knows that in addition to my stellar chef skills (and good looks ha ha), I have a keen eye for detail, I am good with numbers, and passionate about leading people.
Read More
My role at SBT is to support some of the smartest individuals I know by managing payroll, schedules, recruiting, and performance. Showing up to work every day is an adventure. Building a dream with my wife that changes lives, supports families, and makes a difference is more than I could have ever asked for.
Robert D Perez
Chief Operating Officer
About
yoxi@sierrabehavioraltherapy.com
Financial Strategy & Oversight
Hi there! I’m glad you stopped by. I’m Yoxi. I support our SBT families by managing the insurance and billing side of ABA services so you don’t have to navigate it alone. From verifying benefits to answering billing questions, my goal is to make the financial process clear, accurate, and stress-free so that you, and the rest of our team, can focus on your child’s growth and progress.
Planning, Forecasting & Performance
I bring more than 26 years of financial leadership and strategic insight to SBT. Throughout my career, I’ve focused on transforming financial data into meaningful strategy, helping organizations grow sustainably while maintaining operational excellence. I am particularly passionate about my work at SBT because I understand that behind every budget, forecast, and operational plan are real families depending on us for compassionate, evidence-based services.
For me, strong financial leadership isn’t just about numbers. It’s about being a part of lasting, positive change in the lives of the families entrusted to us.
Yoxi Fernandez
Chief Financial Officer
About
yoxi@sierrabehavioraltherapy.com
Financial Strategy & Oversight
Hi there! I’m glad you stopped by. I’m Yoxi. I support our SBT families by managing the insurance and billing side of ABA services so you don’t have to navigate it alone. From verifying benefits to answering billing questions, my goal is to make the financial process clear, accurate, and stress-free so that you, and the rest of our team, can focus on your child’s growth and progress.
Read More
I bring more than 26 years of financial leadership and strategic insight to SBT. Throughout my career, I’ve focused on transforming financial data into meaningful strategy, helping organizations grow sustainably while maintaining operational excellence. I am particularly passionate about my work at SBT because I understand that behind every budget, forecast, and operational plan are real families depending on us for compassionate, evidence-based services.
For me, strong financial leadership isn’t just about numbers. It’s about being a part of lasting, positive change in the lives of the families entrusted to us.
Yoxi Fernandez
Chief Financial Officer
About
betsy@sierrabehavioraltherapy.com
Hi, I’m Betsy, a Board Certified Behavior Analyst (BCBA) with a Master’s Degree in Applied Behavior Analysis and a certificate in Autism. I’ve been working in the field for six years, and I truly love what I do.
Individualized Care & Flexibility
Before becoming an Applied Behavior Analyst, I taught kids how to swim. It was there in the water that I learned to creatively adapt my teaching to fit each child’s unique needs, help them overcome fears, and strive to do more than they thought they could. That experience continues to shape how I approach therapy today. Flexibility, patience, and a focus on individualized support are woven throughout all I do.
Partnering with Families
Helping families work together to overcome challenges, build independence and confidence, and celebrate wins along the way is what keeps me motivated.
Watching progress happen, big or small, is incredibly rewarding and never gets old. I’m honored to partner with families and help their loved ones grow alongside the incredible team at SBT.
Betsy Marichal
BCBA
About
betsy@sierrabehavioraltherapy.com
Hi, I’m Betsy, a Board Certified Behavior Analyst (BCBA) with a Master’s Degree in Applied Behavior Analysis and a certificate in Autism. I’ve been working in the field for six years, and I truly love what I do.
Read More
Before becoming an Applied Behavior Analyst, I taught kids how to swim. It was there in the water that I learned to creatively adapt my teaching to fit each child’s unique needs, help them overcome fears, and strive to do more than they thought they could. That experience continues to shape how I approach therapy today. Flexibility, patience, and a focus on individualized support are woven throughout all I do.
Helping families work together to overcome challenges, build independence and confidence, and celebrate wins along the way is what keeps me motivated.
Watching progress happen, big or small, is incredibly rewarding and never gets old. I’m honored to partner with families and help their loved ones grow alongside the incredible team at SBT.
Betsy Marichal
BCBA
sofia@sirrabehavioraltherapy.com
About
Hi! It’s nice to virtually meet you. I’m Sofia and it’s an honor to be a part of such a wonderful team here at SBT. As a Student Analyst I am currently hold a Master’s degree and am working towards becoming a Board Certified Applied Behavior Analyst. I decided to pursue this career when I was a Senior in high school.
Making Every Child Feel Seen
After taking a “Peers Inclusion” class and having the opportunity to assist other students with learning disabilities, I realized that I found my gifting. I enjoyed helping fellow classmates accomplish their tasks and understand complex assignments, but even more than that, I loved being their friend and showing up for them in ways that made them feel seen and valued. To me, that is what ABA therapy is about. We are the cheerleader, the coach, the teacher, and the friend all rolled into one. It’s challenging. It’s unpredictable. It’s incredibly rewarding and forever impactful.
Sofia Madriñan, M.A., RBT
Student Analyst - RBT
sofia@sirrabehavioraltherapy.com
About
Hi! It’s nice to virtually meet you. I’m Sofia and it’s an honor to be a part of such a wonderful team here at SBT. As a Student Analyst I am currently hold a Master’s degree and am working towards becoming a Board Certified Applied Behavior Analyst. I decided to pursue this career when I was a Senior in high school.
Read More
After taking a “Peers Inclusion” class and having the opportunity to assist other students with learning disabilities, I realized that I found my gifting. I enjoyed helping fellow classmates accomplish their tasks and understand complex assignments, but even more than that, I loved being their friend and showing up for them in ways that made them feel seen and valued. To me, that is what ABA therapy is about. We are the cheerleader, the coach, the teacher, and the friend all rolled into one. It’s challenging. It’s unpredictable. It’s incredibly rewarding and forever impactful.
Sofia Madriñan, M.A., RBT
Student Analyst - RBT
In Network Insurance Providers
We accept all major insurance plans to help make high-quality care accessible to the families who need it.
Let's Start With a Conversation
This first call is simply a chance for us to listen. We’ll learn about your child, your family, and what brought you here. There’s no pressure and no commitment—just a thoughtful, supportive conversation to help you take your next step with confidence. Call now or fill out the form below to contact us.
Or schedule a time to chat below:
We Are With You Every Step of the Way
At Sierra Behavioral Therapy, compassionate care is at the heart of everything we do. Our clinicians prioritize kindness, empathy, and respect in every interaction, building genuine relationships with children and their families.
4 Steps to Get Started
Complimentary Consultation
Take the first step by filling out our quick form and booking your complimentary consultation.
Insurance Verification
We will secure an initial assessment authorization through your insurance provider.
Initial Assessment
We conduct an initial assessment, and our clinical team creates a personalized ABA treatment plan.
ABA Therapy Begins
This is where meaningful change starts. With a personalized plan in place, our expert team begins hands-on ABA therapy.