Willem is a Co-Founder of Cadell - the first and only art advisory firm regulated by the Financial Conduct Authority.  Cadell provides the Private Client industry with blue chip, truly independent advice in a sector where undeclared conflicts present a serious risk to clients.  

Willem works with over 30 top Legal Firms, Professional Trustees and Family Offices delivering professional grade selling, buying and valuation advice for art, decorative objects, furniture and jewellery worth $300-500m per year.  Cadell covers all client needs at every value level, values for individual works can range from a few thousand up to many millions.  Willem is supported by Cadell’s team of 26 highly experienced independent sector experts.  He advises on clients primarily in London, Geneva, Lausanne, Zurich, Monaco, Jersey, Guernsey and the Isle of Man. 

A former global Executive Management Board member at Christies, Willem was responsible for Group Operations. Additionally, Willem has a background in Corporate Finance, Risk Management and Management Consulting.  He has also advised major Private Equity investors in the art sector. Willem was educated at Bristol University (BSc.), Warwick Business School (MBA) and INSEAD (Executive Leadership).