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Cosima Trabichet-Castan is a lawyer with over 10 years of experience advising private and institutional clients in the field of real estate. Her practice focuses on transactions and development projects, including legal advice on all matters related to real estate assets.
Before qualifying as a lawyer in 2014, Cosima studied at the Universities of Fribourg and Geneva (incl. an exchange with McGill University in Montreal). She also holds a Master’s degree from the Geneva Institute for Real Estate Studies (IEI) and is a qualified member of RICS (MRICS).
Prior to joining EY in 2025, Cosima worked in the real estate department of a prominent Swiss law firm in Geneva, of which she became a partner in 2020. Her background as a litigator and former judge at the Geneva rental court has forged her pragmatic approach to legal issues. With a strong dealmaking mentality, she constantly seeks the best solutions for her clients.
How Cosima is building a better working world
"I am focused on finding pragmatic solutions to help make my clients’ real estate projects a reality. Seeing buildings come out of the ground or being successfully renovated knowing that I contributed to the project is a great satisfaction to me. I hope to look back one day and be able to see the positive outcome of our work towards greener, more sustainable cities and ecosystems."