About us
We exist to expand the knowledge and practice of ABA around the world.
Beyou Global Institute was born from a decision: to contribute to the science that changed our lives by training new ABA professionals. We start with Brazil.
All classes are in Portuguese.

- I.
Evidence
Everything we teach starts from the science of behavior and international standards.
- II.
Practice
Real cases, role-play and feedback, because ABA is learned by doing.
- III.
Learning
Courses designed with andragogy, the science of how adults learn.

Our origin
A family story gave rise to a global mission.
Mariana and Eston Greub founded Beyou Group in California after experiencing at home what humanized ABA does for a family. The group grew in clinical care, family education and research.
Over time, it became clear that serving well was not enough. For more families to have access to quality ABA, the world needed more well-trained professionals. The Beyou team had to contribute to the field by training the people who will care for the next families.
“We knew more people in the world should have access to the wonders of ABA.”
Why start with Brazil
The same need as the United States, with far fewer certified professionals.
The number of people who need treatment in Brazil is similar to that of the United States. The number of professionals with international ABA certification is much smaller. That gap is where the Institute works.

“In operations, we feel this every day: the opportunities exist. What is missing are qualified professionals ready for them.”
The co-founders
An idea that became a mission when three people joined forces.
Mariana shared the idea with Jackson and Sabrina: the Beyou team needed to train new ABA professionals, starting with Brazil. Sabrina brought operations experience. Jackson brought education and technology. Together, they stood by Mariana to get the Institute off the ground.
Jackson and Mariana have known each other since 2012, when they studied together in the United States. Sabrina has been with Mariana since the start of Beyou Behavior Therapy.


President of Beyou Group
Mariana Bolzani Greub
Mission and science
Behavior analyst, member of the IBAO advisory board and creator of the BCEM™ and CLERA™ models. Brazilian, lives in California, where she founded Beyou Group with Eston Greub. Leads the academic vision and the bridge to the IBAO.

CEO · Co-founder
Jackson Fernandes
Strategy and operations
More than 15 years in education. For 8 years he was CTO of one of the largest edtechs in Brazil, where he led the development of educational products used by more than 5 million higher education students in Brazil and Latin America. As CEO, he leads the strategy and the entire operation of the Institute, with a focus on the student experience.

COO · Co-founder
Sabrina Jesus
Operations & Relationships
Specialist in OBM (organizational behavior management) and co-founder of Beyou Behavior Therapy. She built the group’s operations from the start, created the COM™ model and led innovation in remote services. At the Institute, she makes everything work, from Brazil to the United States.
Mission
Expand the knowledge and practice of ABA around the world.
Vision
To be the reference in international-standard ABA training in Brazil and in Portuguese- and Spanish-speaking countries.
Values
Ethics · Evidence · Real practice · Human care · Cultural respect

Innovation in ABA
Mother, co-founder and creator of BCEM™ and CLERA™.
From the heart of San Francisco, Mariana Bolzani Greub developed two models that put the family at the center of intervention. They have already been applied with more than 300 families in several countries.
“ABA clinicians are scarce, and caregivers can be part of the solution. We created BCEM™ to give clinicians tools that help families build skills, and CLERA™ to understand how training and coaching should be offered to each caregiver.”

BCEM™
Behavioral Caregiver Empowerment Model
Builds caregivers’ ability to apply ABA in daily routines, under clinical supervision.

CLERA™
Caregiver Readiness Assessment
Assesses each caregiver’s readiness to learn and teach, so the plan starts from where the family is.
Coming soon in Brazil
BCEM™ and CLERA™ certification for Brazilian clinicians.


Why the IBAO
Official IBAO partner in Brazil.
The IBAO was born from a hard decision. When the BACB stopped supporting the certification of professionals outside the United States and Canada, Dr. Michael Mueller and Dr. Ajamu Nkosi, Ph.D., BCBA-D, IBA, decided to fight so that ABA standards would remain within reach of the rest of the world.
They understood that copying the educational architecture of the United States would leave many professionals out, because not every country has a master’s degree in ABA. That is why the path to the IBA® goes through high-standard ABA training, created by IBAO-approved providers, focused on practice, supervision and the exam.
“The IBAO showed that it is possible to welcome professionals and countries of every background without giving up quality and ethics. That is the standard we want to bring to Brazil.”
Authorized provider
Programs aligned with the IBT® and IBA® certifications, in Portuguese.
Advisory board
Mariana is a director of the IBAO professional advisory board.
IBAO Conference 2027
The second annual IBAO conference takes place in Brazil, in October 2027.
The Beyou ecosystem
Part of a group that cares, researches and teaches.
Beyou Group was founded in California by Mariana and Eston Greub. Each company in the group has a role, and together they cover the full path: from caring for families to training professionals.
- Care
Beyou Behavior Therapy
Caregiver-mediated ABA, in person and via telehealth.
- Knowledge
Beyou Foundation
Research, access and support for families in communities with fewer resources.
- Education · You are here
Beyou Global Institute
Training, certification and professional development in ABA.
- Higher education · Being established
IUBS
International University of Behavioral Sciences.
Who walks with us
Clinical and educational leadership.

Executive director
Eston Greub
Strategy, institutional leadership, partnerships and organizational performance.

Director of Education and Programs
Michele Tozadore, IBA
Courses, curriculum, faculty, educational quality and international certifications.

Course Development Coordinator
Débora Leite
Instructional design, course production, teaching materials and content development.
Student Success Coordinator
Andrisa Fraga
Student onboarding, engagement, learning support and certification preparation.
- 200+
families served by the group
- 9
countries with our team
- 70+
professionals and consultants
- 78+
professionals around the world supporting the development of the educational material
Timeline
From one family to families around the world.
2019-2020
Two diagnoses
Mariana and Eston’s children are diagnosed with autism.
2021
ABA changes everything
The family experiences humanized ABA and sees what it can do.
2022-2023
Beyou Group is born
In California, so that every family has this access.
2024-2026
Global reach
Caregiver-mediated model in several countries, the Foundation, BCEM™ and the Global Institute.
Oct · 2027
IBAO in Brazil
The second annual IBAO conference takes place in Brazil.
Be part of our story.
Whether to start in ABA, get certified or train your team, there is a path for you.
