Cybersecurity Beyond the Tools: Investments,…
Our organization
Executive Leadership
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Matthieu Courtecuisse
Founder & CEO | New York
Matthieu Courtecuisse is the Founder & CEO of Sia (1999). An AI & maths engineer by training, he leads Sia's North America hub from New York. He has authored several books on economics, is active in think tanks such as the Milken Institute and the Economic Club of New York, and received the 2025 SIFMA Foundation Industry Award.
Linkedin Email contact matthieu.courtecuisse@sia-partners.com
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Sandrine Carreau
President & Chief Operating Officer | Paris
Sandrine Carreau is the President & Chief Operating Officer of Sia. After graduating from EDHEC, she joined Sia in 2012 and held various corporate roles before taking on her current position in 2024. She oversees group-wide operations, including M&A strategy.
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Alix de Guibert
Group CFO | Paris
Alix de Guibert is the Group CFO of Sia. After graduating from ESSEC, she began her career in audit, transaction services and advisory at PwC before joining the Group finance leadership at Publicis, then Vivarte. Since 2019, she oversees Sia's financial performance and strategy.
All our leaders
Use the below filters to find experts in your country or your industry.
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Roberto Wyszkowski
Partner, Public Sector | Middle East Hub
For the past 20 years, Roberto has served as consultant and management coach at many large organizations, focusing on strategy planning and execution, innovation, change management, and corporate performance management.
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Romain Zaouali
Managing Director, Cybersecurity, Data Privacy & AI Trust | Paris
Romain is a Managing Director for Cybersecurity, Data Privacy & AI Trust at Sia in Paris. A graduate of EPITA, he began his career at Thales and Deloitte France before joining the firm in 2020. He now leads initiatives on IT risk management, cyber resilience, and AI security for large organizations.
- Cybersecurity & AI Trust
- Data Protection
- IT Strategy & Digital Transformation
- Business Transformation
- Data & Artificial Intelligence
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Ronan Davit
Associate Partner | Denver
Ronan helps our P&C clients improve their actuarial capabilities to better steer their performance with a strong focus on model (risk) management and stress test / recovery programs. He also advises them on how new data / technologies / risk / insurance usages can be a source of value creation.
- Augmented Enterprise Performance Management
- Finance, Risks & Actuarial
- Risk Management
- Actuarial & Quantitative Services
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Ryan Shellard
Associate Partner, Energy, Utilities and Environment | London
Ryan is an Associate Partner in the Energy, Utilities and Environment practice in London.
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Sang Joon Ahn
Managing Director, Data & AI APAC | Hong Kong
Sang is a Managing Director based in Hong Kong, where he drives Data & AI strategy advisory and AI product development, leveraging extensive expertise across APAC in data-driven solutions, AI-first methodologies, and regional scaling.
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Sara Michaux
Head of Talent Development | Brussels
Sara Michaux is Head of Talent Development at Sia. After graduating in occupational psychology, she began her career at Hudson before joining Sia in 2018. She now leads the group's talent development strategy, covering skills growth, mobility and career management.
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Sara Trevisanato
Managing Director | Milan
Sara is the Managing Director in the Banking practice and Leader of the Global Payments Team. She has extensive international experience in Retail Banking and Cash Management, supporting clients in their digital transformation journey, from the design to the go-to-market of innovative solutions.
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Sébastien Charreire
Partner, Technology Advantage | Paris
Sebastien is the Partner in charge of our Technology practice. He leads studies, benchmarks, audits and transformation projects, relying on technologies to help our clients meet their business needs and drive future-forward, sustainable impact and competitive advantage.
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Sebastien Gerber
Managing Director | London
Sebastien is a Managing Director based in London, specializing in AI strategy and data-driven innovation, with expertise in energy and utilities. He helps organizations improve performance through analytics and digital transformation.
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Sébastien Vernède
Associate Partner, HR & Transformation | Paris
Sébastien is a Managing Director in our Human Resources & Transformation practice. He supports his clients, CEOs, HR Directors and Transformation leaders, in large scale transformation programs. He has developed expertise in HR performance, New Ways of Working and labour relations.
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Sébastien Zimmer
Partner Energy | Paris
Sebastien is a Partner in the Energy practice based in Paris. He brings with him more than 25 years of experience in the energy sector, with strong expertise across the entire energy value chain, and a focus on market analysis, strategic positioning, and regulatory frameworks.
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Ségolène Ramadier
Global Head of Tech Partnerships and Ventures | Paris
Ségolène Ramadier is Global Head of Tech Partnerships and Ventures at Sia, overseeing the group's relationships with leading global technology companies and Sia's startup investment fund. After graduating from ESCP, she joined Sia in 2013.
