His practice is primarily devoted to mergers and acquisitions, private equity and venture capital. He has been an attorney since 2003, initially with Van Mens & Wisselink, and since May 2008 with Benvalor. His clients include investment firms, private investors and startups. Sjoerd is a contributor to legal professional journals and regularly lectures on private equity and venture capital. He is board member of the Dutch Corporate Finance Association and startup mentor at UtrechtInc.