Ad van Wijk is sustainable energy entrepreneur and part-time Professor Future Energy Systems at TU Delft, the Netherlands. He works for the KWR Water Research Institute to develop and implement the research program Energy and Water and is hydrogen ambassador for the Northern Netherlands at the New Energy Coalition
In 1984, van Wijk founded the company Ecofys, which eventually grew into Econcern. Econcern developed many new sustainable energy products, services and projects. Examples include the 120 MW offshore wind farm Princess Amalia in the North Sea, several multi-MW solar farms in Spain and a bio-methanol plant in the Netherlands, which is the largest second-generation biomass plant in the world.

Ad has won prizes for outstanding entrepeneurship, among others Dutch Entrepeneur of 2007 and Top Executive in 2008.