Sophie Martinet

Sophie Martinet joined HSD Ernst & Young (the Ernst & Young network’s French law firm) in 1990. She worked on a wide range of labour and social security law issues, providing advice to clientsostly management executives from English-speaking companies) to help them plan against potential liability under labour law and criminal law, and also defending them in litigations.


In 2006 she took the entrepreneurial route as co-founder of Cassiopee Avocats, with a calling “to be attentive to the needs of French and foreign clients, taking a service-oriented approach to offer them decision-making support and accompany them through both successful and difficult times.”


As a legal advisor, Sophie works in all areas of labour law and has developed litigation experience before the labour and social security tribunals. Her primary fields are corporate restructuring, social security inspections, employee savings plans and individual labour relations. She has gained particular expertise with English-speaking clients and non-profit organizations, and also advises private individuals, especially management executives.


Sophie holds a Master of Business Administration (MBA) from the University of South Florida, a DEA postgraduate qualification in Anglo-American business law from the University of Paris I (Sorbonne), a Masters degree in business and tax law from the University of Paris II (Assas) and a degree from the Higher Institute for Translation and Interpretation (ISIT – English and German) (Catholic Institute of Paris). She teaches labour law in top French higher education establishments.



Christine Bonnefoy

Christine Bonnefoy started her career with stints in different medium-sized law firms before joining HSD Ernst & Young (the Ernst & Young network’s French law firm) where she worked in all areas of business law. She advises and assists clients in a broad range of operations including mergers and acquisitions, restructuring, new establishments, and company formations and takeovers. She monitors clients’ legal affairs in the fields of company law, commercial and economic law, intellectual property law, finance and banking law.


In 2006 she chose to found a smaller-scale law firm, able to combine the values inherent to a large business law firm with a more individual touch. Her emphasis on personal contact with clients is the foundation for tailored services involving in-depth work with dedication and commitment. Christine is constantly motivated by a concern for meticulous excellence in a highly ethical framework.