Mignon advises family businesses and their shareholders. Her expertise includes business succession, privacy protection and wealth structuring. She also advises multiple charities on their tax position. Explaining complex laws and regimes in an accessible manner to clients and finding suitable solutions that take into account intra-family relationships and business interests is what Mignon enjoys most about her profession. Mignon holds a degree in Dutch tax law from Leiden University and a degree in U.S. tax law from the University of Florida. She has worked as a tax advisor since 2011. In 2019, Mignon joined Arcagna where she became a partner in 2025. Mignon is a member of the Dutch Bar Association for tax advisors, the New York Bar Association and the International Bar Association. Mignon is also a member of the Society of Trust and Estate Practitioners.