The Mathematician Who Became a Stage Coach.
"I didn't plan to build a communication method.
I built it because I couldn't find one."
The same pattern. Every room.
I have seen it in boardrooms, in start-up pitches, in TEDx rehearsals, and in leadership training sessions: a brilliant person with a genuinely important idea who cannot make it land. Not because the idea is wrong. Because nobody ever gave them the architecture of communication, only tips and tricks.
"Speak slower." "Open your palms." "Make eye contact." These instructions are not wrong. They are just disconnected from the real problem, which is structural: what to say, in what order, with what level of detail, for which specific audience... and then how to deliver it in a way that feels fully yours.
"Structure without presence is just a lecture. Presence without structure is just a performance. Neither works without genuine connection."
— Damien Gauthier, founder of Impactful Speaking
That gap between expertise and impact is exactly what the IS Method was built to close. Read below the full story: the framework, the person behind it, the results it produces, and the voices of people who went through it.
The tale of two paths
I spent a decade as an engineer and UX consultant, working at the intersection of complex systems and the humans who had to understand them. In parallel, I was performing in theatre, first as a hobby, then professionally for 10 years, and later curating and coaching TEDx speakers.
Two worlds that seemed completely separate. Until I realized they were solving the same problem from opposite ends: the corporate world had structure but no presence; the stage world had presence but no structure. Neither had a method that worked in both.
Impactful Speaking is what happened when I stopped keeping the two paths apart. It is a framework that borrows rigour from mathematics, delivery from 25 years of stage work, and the structured user-centred approach from a decade of design thinking and innovation. Because communication is, ultimately, a design problem.
30 years across two disciplines, converging in one method.
Mathematics & PhD
Studied mathematics at EPFL: Master, PhD, then Lecturer. Discovered that rigour produces clarity, but only if you communicate it.
The communication gap
Presented and see others present complex ideas to non-expert audiences. Witnessed the gap between knowing and communicating.
Experts who couldn't land
Worked with technical experts to pitch to clients. Began developing structured communication frameworks that doubled success rate.
Application to corporate presenting
Founded Impactful Speaking. Built the end-to-end IS method for expert minds in professional settings.
Presence as technique
Trained in improv and acting. Discovered that presence is not talent, but a technique.
Communication as design
Directed productions. Learned that communication is a design problem: structure + intention + audience.
Stage craft meets expertise
Became a TEDx coach. Applied stage craft to high-stakes expert presentations.
The IS Method emerges
Merged both paths into the IS Method, the first framework that treats communication as both a technical and embodied skill.
Impactful Speaking is the quintessence of these two paths: borrowing rigor and clarity from mathematics; stage presence and delivery techniques from theatre; and frameworks and the structured approach from design.
It is the first framework to treat communication as both a technical and an embodied skill.
Three things I know about communication.
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It is learnable.
Being a good communicator is not a gift, not a personality type, and not just for extraverts. It is a skill with learnable components. Everyone I have worked with who committed to the method improved. Without exception.
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Most training focus on the wrong things.
Most trainings focus on tips: speak slower, open your palms, make eye contact... rather than structure: what to say and why. Tips without a proper foundation are what make you come across as robotic or false.
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The expert problem is specific.
Experts face a different challenge than general speakers: they know too much. The method of selecting what to say and what to leave out is the hardest part. That is why I developed a method to select the right arguments and the right level of detail.
Our work in figures.
Ready to work together?
Book a 30-minute discovery call. We'll talk about your situation, your goals, and whether there's a fit.