From Engineering to ADHD Coaching
Your brain isn’t broken - it’s wired differently. And that difference can be your greatest strength.
How I Got Here
I’m Brett Weggelaar - engineer first, coach second, and a late-diagnosed ADHD adult the whole way through. I studied mechanical engineering, then spent thirteen years in the oil and gas industry - solving complex problems, leading under pressure, and looking successful from the outside while quietly fighting my own brain to keep it all together.
I wasn’t diagnosed with ADHD until adulthood. Like many late-diagnosed adults, I’d spent decades building my own systems through trial and error - some brilliant, some barely holding. The diagnosis didn’t change who I was. It finally explained who I’d always been.
I’ll be honest about the cost of not knowing sooner: my untreated ADHD played a real part in the breakdown of my marriage. Rebuilding that relationship took deep personal work - ontological, somatic, uncomfortable, worth it. I came out the other side a happier, more present husband and father. That experience is why relationship coaching sits at the heart of what I do.
Today I bring both sides of my life to this work: an engineer’s systems thinking and root-cause discipline, and the lived experience of an ADHD brain that’s been where my clients are. I trained to advanced level through the ADD Coach Academy, one of the only ICF and PAAC accredited ADHD coaching programs in the world, because you deserve more than good intentions. These days I coach from Fremantle, just south of Perth, and work with clients across Australia and internationally over Zoom. I also serve on ADDCA faculty and mentor ADHD coaches in training, which keeps my own practice sharp and honest. If you are a coach in training and looking for a mentor, you are welcome to reach out as well.
I’m a champion of authenticity and uniqueness in the context of shared purpose, and I specialise in unconventional thought leadership.
How I See ADHD
Two principles guide every session I run.
Difference NOT Disability
Your ADHD brain isn’t a deficit to manage - it’s a different operating system. When you understand how yours works, traits you’ve fought for years become the foundations you build on.
Explanation NOT Excuse
ADHD explains the patterns - it doesn’t excuse the impact. We hold both truths: real compassion for how your brain works, and real ownership of the life you want to build with it.
Training & Experience
Engineering Rigour
A mechanical engineering degree and thirteen years in oil and gas. I bring systems thinking, root-cause analysis, and structure that holds up under real-world pressure.
Accredited ADHD Training
Trained to advanced level through the ADD Coach Academy, one of the only ICF and PAAC accredited ADHD coaching programs globally, where I now serve as faculty and mentor ADHD coaches. Evidence-based coaching with ontological and somatic depth.
Lived Experience
Diagnosed in adulthood. Married, father of two, based in Fremantle. I don’t coach ADHD from a textbook - I live it, and I’ve rebuilt with it.
ICF PCC - Professional Certified Coach, International Coaching Federation
PAAC PCAC - Professional Certified ADHD Coach, Professional Association of ADHD Coaches
ADDCA ACCG - Advanced-level graduate, ADD Coach Academy
Trauma-Informed Coaching - Certificate
Member - Australian ADHD Professionals Association (AADPA)
Professional Member - ADHD WA
Who I Work With
Executives & Leaders
Leaders and high performers who’ve mastered the outside game and want the inside to match. Sustainable performance without survival mode. Executive coaching →
Relationships
Individuals and couples untangling how ADHD shows up in connection, conflict, and communication - including rebuilding after separation. Relationship coaching →
Students & Life Transitions
Year 11-12 and university students, parents, and career changers building study systems and life foundations that fit their brain. ADHD coaching →
Ready to Work Together?
A 30-minute discovery call is free. No obligation, no pressure - just a conversation to see if this is the right fit for you.
ICF PCC certified · ADHD specialist · Ontological & Somatic approach · Perth-based, global clients