Catherine Mathieu Consultant Solicitor

Catherine has over twenty years’ experience spanning private practice and senior in-house roles. She advises individuals, companies, family offices and international professionals on a wide range of private client, probate, tax and governance matters.

Catherine brings balanced insight, clarity and discretion to the most sensitive situations. Clients value her responsiveness, ability to untangle complexities, and calm, strategic guidance in high-stakes matters.

Areas of expertise

• Wills and estate planning
• International succession and probate
• Private client and succession disputes
• Estate administration
• Mediation and negotiated settlements
• Grievance matters
• Tax considerations for individuals, expatriates and international families 

Approach to work and clients

Catherine’s approach is strategic, pragmatic and human-centred. She aims to make complex issues straightforward, providing clear and actionable guidance while supporting clients with empathy and discretion.

Preparation and careful case analysis sit at the core of her practice. Catherine takes the time to understand each client’s objectives, risks and wider circumstances, ensuring every angle is considered so clients feel confident and well-informed throughout the process.

Career Highlights

• Acted on complex multi-jurisdiction probate matters, coordinating estate administration for high-net-worth clients.
• Advised family offices and clients on structuring, governance, tax matters and long-term succession planning.
• Requalified as a solicitor after more than two decades of practice as a French Avocat, offering a unique dual perspective.

Outside of her legal practice, Catherine enjoys mentoring students and serves as an examiner for the Bar exam. She is also active within her community through various associations, reflecting her commitment to professional development and enabling her to stay connected and engaged.