Roan is a leading investigations and enforcement lawyer with an extensive international practice. He is a trusted adviser to some of the biggest Dutch multinationals for their global compliance and investigations issues. He also acts for prominent international clients on complex international criminal matters and has experience in the media, oil and gas, and financial services industries.

Roan has a particular focus on Asia and is currently leading several sensitive investigations in China. He maintains an extensive network of leading investigations firms in various Asian jurisdictions including China, Japan, South Korea, Hong Kong and Singapore. Roan also remains active in Dutch enforcement matters, including criminal trials.

Roan is a tenured professor of Financial Criminal Law at VU University Amsterdam and teaches a postgraduate course that attracts legal practitioners as well as regulators and investigative services. He is also co-editor of the leading legal treatise on white collar crime in the Netherlands and a co-editor of a compendium on insider trading.

Chambers (2026) quotes: "Roan is the most pleasant and trusted adviser I have ever met." According to Legal500 2026, Roan "is sought-after by Dutch multinationals for his knowhow in sensitive investigations".