Sjaak is CEO and an experienced MedTech executive with ample experience in fund-raising and creating and growing a MedTech company for complex Class III medical devices. Over 25 years of experience in R&D project management, product management, creating and managing alliances, and early stage venturing, mainly for MedTech and Healthcare products. He worked for Philips Medical, Philips Healthcare and Medtronic. He is the founding CEO of Sapiens Steering Brain Stimulation, a company for which he has raised 48 m€ to grow it from 3 to 64 employees in less than 4 years, when the company was sold to Medtronic. Sjaak joined GTX medical in February 2015.