Catherine MATHIEU

Monte-Carlo Société des Bains de Mer - Flagship state-owned luxury hospitality group - 4,000 + employees - Co-drive strategic transformation and ESG/CSRD integration at board level. - Lead a multidisciplinary HR division delivering workforce planning, digital onboarding, and compliance. - Embed ethical alert systems and manage complex absenteeism issues to improve resilience. - Align people strategy with operational performance and long-term corporate values.

International private client and cross-border legal practice - Advise clients on UK-France cross-border employment, tax, probate, and immigration. - Provide legal opinions, risk assessments, and structuring advice in complex multi-jurisdictional matters.

Greek-US UHNWI Family - Provided strategic legal and HR counsel across France, Monaco, UK, and Switzerland. - Directed succession planning, yacht operations, and philanthropic governance. - Improved operational efficiency and reduced cross-border legal exposure.

Russian UHNWI Family Structured and managed multi-jurisdiction legal, compliance, and HR operations. Oversaw major investments, acquisitions, and high-profile asset transactions (including AS Monaco FC). Established governance frameworks to protect and grow cross-border holdings.

- Provided legal counsel on employment law and compliance for corporate and private clients. - Drove business development initiatives, significantly expanding the firm’s client base and service offerings.

• Led the Compensation & Benefits Department at Monoprix, overseeing a team of 40 professionals. • Implemented a new incentive program for 14,000 employees, significantly enhancing productivity and reducing absenteeism. • Negotiated collective agreements that strengthened labor relations and fostered organizational cohesion. • Restructured benefits systems to achieve operational efficiencies aligned with business objectives.

• Led the Compensation & Benefits Department for Altran, driving strategic compensation initiatives across a global engineering and consulting landscape. • Designed and implemented international mobility policies for over 1,000 executives, enhancing overseas assignment success. • Optimized tax and social security structures, significantly reducing compliance risks and improving cost efficiency.

• Advised clients on tax optimisation strategies, residency issues, and social security coordination across multiple jurisdictions. • Prepared and reviewed complex individual tax returns, ensuring compliance with international reporting requirements. • Collaborated with cross-functional teams at EY to deliver tailored solutions, enhancing client satisfaction and retention.

• Assisted with personal tax returns and cross-border compliance for internationally mobile clients, ensuring adherence to regulations.