How to Scale a Consulting Firm Globally | Matthieu Courtecuisse & Prof. Joe O'Mahoney
Wed Feb 04 2026
What does it take to build a consulting firm that is global from day one?
In this episode, Joe O’Mahoney speaks with Matthieu Courtecuisse, Founder & CEO of Sia, about the long-term decisions behind building one of the world’s largest founder-led consulting firms.
Matthieu shares how Sia was built with international scale in mind from the very beginning, why founder commitment matters more than capital in global expansion, and how early investments in data, AI, and technology shaped the firm’s competitive advantage. He explains Sia’s augmented consulting model, where proprietary platforms and AI tools sit at the core of delivery—not as add-ons.
The conversation also covers Sia’s approach to growth through selective acquisitions, the balance between building and buying capabilities, and how culture-led integration supports scale. Joe and Matthieu close by discussing how AI is reshaping consulting economics, talent models, and why firms need to think in decades, not quarters, when building lasting value.
In this episode you will learn:
Why Sia was built with global scale as a core ambitionHow founder commitment drives successful international expansionWhy early investment in AI and data created long-term advantageWhat augmented consulting looks like in practiceHow Sia approaches M&A without diluting cultureWhy consulting firms must think long-term to build real value
This episode offers a long-term view on what it takes to build a global consulting platform—through sustained investment, founder leadership, and a clear belief in technology as a driver of scale and value.
Connect with Matthieu:
LinkedIn: Matthieu Courtecuisse
Website: SIA-Partners.com
Resources:
SIA Case Study
Send us a text
Prof. Joe O'Mahoney helps boutique consultancies scale and exit. Joe's research, writing, speaking and insights can be found at https://equitysherpa.com.
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What does it take to build a consulting firm that is global from day one? In this episode, Joe O’Mahoney speaks with Matthieu Courtecuisse, Founder & CEO of Sia, about the long-term decisions behind building one of the world’s largest founder-led consulting firms. Matthieu shares how Sia was built with international scale in mind from the very beginning, why founder commitment matters more than capital in global expansion, and how early investments in data, AI, and technology shaped the firm’s competitive advantage. He explains Sia’s augmented consulting model, where proprietary platforms and AI tools sit at the core of delivery—not as add-ons. The conversation also covers Sia’s approach to growth through selective acquisitions, the balance between building and buying capabilities, and how culture-led integration supports scale. Joe and Matthieu close by discussing how AI is reshaping consulting economics, talent models, and why firms need to think in decades, not quarters, when building lasting value. In this episode you will learn: Why Sia was built with global scale as a core ambitionHow founder commitment drives successful international expansionWhy early investment in AI and data created long-term advantageWhat augmented consulting looks like in practiceHow Sia approaches M&A without diluting cultureWhy consulting firms must think long-term to build real value This episode offers a long-term view on what it takes to build a global consulting platform—through sustained investment, founder leadership, and a clear belief in technology as a driver of scale and value. Connect with Matthieu: LinkedIn: Matthieu Courtecuisse Website: SIA-Partners.com Resources: SIA Case Study Send us a text Prof. Joe O'Mahoney helps boutique consultancies scale and exit. Joe's research, writing, speaking and insights can be found at https://equitysherpa.com.