45: How to Scale a Consulting Firm Globally with Matthieu Courtecuisse

Episode notes

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.

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