Garentia | International Certification for ADHD Coaches
Internationally Accredited Certification

The certification for people built to do this work.

ADHD coaching asks for a rare mix of natural traits. If you carry them, this certification turns them into a profession, with training built over 14 years of practice and credentials recognized by 5 international accreditation bodies.

See the Full CertificationInternationally accredited · Self-paced · Lifetime specialist support
5
International
Accreditations
14+
Years of
Hands-On Practice
98%
Student
Success Rate
200+
Hours Of
Instruction

As Featured On

What Garentia Does

An education company for work that actually matters

Garentia was founded in 2023 on a single, unusual idea: that the capacity to support someone with ADHD is not a rare gift bestowed on a few specialists. It is a combination of natural traits already present in millions of ordinary people, most of whom have no idea they carry it.

We exist to help those people recognize what they carry and make it real. Everything we teach is built on the 5-trait framework Linda developed over 14 years of hands-on practice, then wrapped in the training, credentials, and ongoing support it takes to enter a field that desperately needs them.

Today, our coaches serve clients across the world, meeting people with ADHD exactly where they are, with an affirming, evidence-based approach rather than "try harder" advice, using the methodology our founder spent her career refining.

Our Mission

To reach the people who carry the rare mix of traits ADHD clients need most, equip them to do this work professionally, so no one who needs affirming, credible help has to go without it.

The 5 traits this work is built around

These are the traits our founder identified, after 14 years of clinical observation, as the combination that consistently produces effective ADHD coaches. They cannot be taught. Everything else can.

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Intuitive Empathy
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Deep Patience
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Non-Judgmental Acceptance
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Adaptive Thinking
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Emotional Stamina

If you saw yourself in those five, people across the world need exactly what you carry. The certification is how you turn it into a profession.

See the Full Certification
Meet The Founder

The accountant who became one of the field's most respected practitioners

Linda Hamilton, Founder of Garentia
Linda Hamilton
Founder & Lead Practitioner

Linda spent the first two decades of her career as an accountant. She was good at it. Precise, reliable, thorough. But she carried a quiet restlessness she couldn't name: the feeling that she'd been built for something she hadn't yet found.

That something arrived when she was 48. Her young nephew was diagnosed with ADHD. While the rest of the family pulled back, uncertain and afraid of saying the wrong thing, Linda moved closer. She sat with him. She followed his lead. She met him exactly where he was. And he responded in ways no one expected.

For the first time in her adult life, the restlessness went quiet.

She was the first person who had ever made our son feel understood rather than managed. From one of Linda's earliest client families

Linda left accounting. She invested almost everything she and her husband had saved into years of intensive study in ADHD, executive function, behavioral frameworks, and evidence-based coaching. She earned advanced credentials from five international accreditation bodies. Then she built a practice from nothing, growing it into one of the most respected in her region, eventually serving over 250 clients across 14+ years.

It was through that hands-on work that she identified the five-trait pattern that defines who naturally connects with people with ADHD. She built the certification program her coaches now use to channel those traits into professional practice. She submitted the program back to the same five accreditation bodies that certified her own credentials. Every one of them accepted it.

Linda still sees clients personally. The one-on-one work is where the calling started, and she has no intention of leaving it behind. But the bulk of her energy now goes into the program, the methodology, and the growing community of certified ADHD coaches carrying her work to people around the world.

Accredited & Recognized By
The Certification

What you actually get when you train with us

A complete, internationally accredited certification, designed specifically for people who already carry the five traits and are ready to turn them into a profession.

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25-Module Curriculum

200+ hours of self-paced video instruction and written material covering every part of ADHD coaching, from how the ADHD brain actually works to applied client work across life stages and practice-building.

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5-Body Accreditation

Your certification is recognized by IPHM, CMA, IAOTH, ICAHP, and AADP. These are the same five international bodies that certified Linda's own credentials.

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Lifetime Specialist Support

Direct access to Linda and her team of ADHD and coaching specialists for as long as you're practicing. Questions answered, situations talked through, never alone.

See the Full CertificationSelf-paced study with lifetime specialist support
From Our Coaches

Hear from the people already doing this work

5 out of 5 stars

"I was sure I needed a psychology degree. I didn't."

I almost didn't enroll because I have no clinical background at all. But the program teaches the brain and the coaching skills from the ground up, in plain language. Within a few weeks I was helping clients build routines that actually stuck. You do not need letters after your name to do this well.

5 out of 5 stars

"It gave my coaching a real specialty."

I'd coached for years on general productivity, but ADHD clients kept finding me and I was working off guesswork. This gave me the actual mechanisms: executive function, motivation, why the usual advice backfires. Now I know what I'm doing, my clients trust me more, and my referrals have gone up.

5 out of 5 stars

"I started it for my son. I kept going for everyone else's."

I signed up to understand my own ADHD child and stop the nightly homework battles. It worked at home faster than I expected. Then other parents at school started asking how I did it, and I realized I could do this for a living. I now coach families through the exact chaos we used to live in.

5 out of 5 stars

"I did the math, then I stopped hesitating."

I sat on this for weeks. Then I worked out that just a few clients a month at normal coaching rates would cover the cost many times over. The risk was basically zero. I enrolled that night and had my first paying client within two months.

Common Questions

The things people ask before they get started

What exactly is Garentia?▼
Garentia is an education company that trains and certifies ADHD coaches. We were founded in 2023 by Linda Hamilton, a former accountant turned 14-year clinical practitioner, with a single mission: to reach the people who naturally carry the rare combination of traits ADHD clients need most, and equip them with the training, credentials, and ongoing support to do this work professionally. We are not a therapy provider. We do not work with clients directly. We train the coaches who do.
Who's actually behind this? Is this a real company with real people?▼
Yes. Garentia was founded by Linda Hamilton, who you can read about in detail in the founder section above. Linda spent 20 years as an accountant before pivoting to ADHD coaching after her nephew's diagnosis. She holds advanced credentials from five international accreditation bodies and ran a practice serving 250+ clients across more than 14 years before building this program.
Are your certifications actually accredited, or is that just marketing?▼
They are genuinely accredited. Linda personally submitted the certification program to the same five international accreditation bodies that certified her own professional credentials: the International Practitioners of Holistic Medicine (IPHM), the Complementary Medical Association (CMA), the International Association of Therapists (IAOTH), the International Compliance Assurance for Holistic Practitioners (ICAHP), and the American Association of Drugless Practitioners (AADP). Every single one accepted the program. Your certification is internationally recognized, professionally credible, and insurance-eligible. This means you can obtain professional liability insurance to protect your practice.
How does this work? What do I do first?▼
It's simple and entirely self-paced. When you're ready, you enroll and get instant access to the full 25-module curriculum inside the course platform. You move at your own pace, most people finish in around 30 days, and when you complete it you receive your internationally accredited certification. From there you keep lifetime access to our specialist support team, so you never coach alone. You can see the full curriculum, accreditation, and everything included on the certification page.
How do I get in touch with you?▼
For any question, support request, or general inquiry, email us at info@perpecta.com. A real person on Linda's team responds, usually within one business day. If you're already a student, you also have access to our 24/7 specialist support channel inside the course platform.

Ready to turn what you carry into a profession?

You already have the part that can't be taught. The certification gives you everything else: 200+ hours of training, credentials recognized by 5 international accreditation bodies, and a specialist team behind you for as long as you practice.

See the Full CertificationInternationally accredited · Self-paced · Lifetime specialist support