Marina is a Swiss-qualified lawyer and is highly specialized in M&A, financing transactions and corporate law. Marina is recommended in leading legal guides, such as Legal 500, Best Lawyers and Leader’s League.

With over 15 years of experience, Marina advises a broad range of clients, including major venture capital and private equity funds, multinational corporations, startups, and SMEs, on various corporate matters, including M&A and distressed M&A, business transfers, venture capital and private equity deals, corporate restructurings, and debt financing. Marina Castelli-Joos also provides legal advice on corporate governance matters, drawing on her extensive professional experience across a wide range of economic sectors.

Before joining id est avocats in 2020, Marina spent over a decade at leading Swiss commercial law firms, gaining extensive experience in both advisory and transactional work. She accomplished her legal studies at the Universities of Geneva and Lucerne, as well as Harvard Law School.

A regular lecturer and published author, Marina contributes to professional publications and has served as the Swiss law expert for several chapters of the World Bank Doing Business Report.

She is licensed to practice before all Swiss courts and works fluently in English, French, and Spanish, with working knowledge of German and Italian.

Selected Recommendations:

Marina Castelli-Joos is highly qualified and has extensive experience in M&A. In addition, she has great communication skills and is very efficient. She immediately identified the key elements of the deal and assisted us in completing it to our full satisfaction.’ (Legal 500/2024)

‘Marina Castelli-Joos is excellent at communicating clearly, always commits to the timeline she outlines and has a very pragmatic, business-oriented approach while focusing on the critical points.’ (Legal 500/2024)

‘Marina Castelli-Joos is crazy smart. She thinks about everything. Truly amazed.’ (Legal 500/2023)