Diederick is the CEO of ProfitWise, a renowned international consulting, training and research corporation in the Netherlands. He also serves as the Chief Learning Officer of KCOM Management, a Malaysian-based corporate learning and development consultancy.

Diederick is a leading authority on training needs analysis, training evaluation and ROI. He has worked closely with Donald and James Kirkpatrick, Jack Philips and Robert Brinkerhoff amongst other notable experts. He has written several articles on HRD effectiveness. 

Diederick travels frequently across Europe, North America, Africa, Asia and the Middle East to deliver keynote addresses and to facilitate workshops for HRD professionals and business leaders.

Diederick Stoel has supported many organizations in improving the ROI of their training portfolios. As an entrepreneur he is keen on partnering with his clients and investing in high impact HRD initiatives. 
In 2006, Diederick received the ‘HR Leadership Award’ at the World HRD Congress in Mumbai, India. He serves as the Chairman of the Donald Kirkpatrick Foundation and was the 2005 Chairman of the American Society for Training & Development (ASTD) ROI Advisory Committee. He currently serves as a board member of the Asian HRD Congress. 

Diederick Stoel's clients include Heineken, Ikea, Unilever, Randstad, Mars, Philips, Malaysian Airports, Telkom South Africa and many more.