H.A. (Erik) Roelofs, commonly known as ER(ik), is a medical physicist and scientist with a history in system engineering, involving project management and product design in a holistic, mechatronic approach. This overarching profile is reflected in his work combining the domains of medical physics and informatics, with the previous development of medical data exchange infrastructures and knowledge-driven decision support systems, among others. As Medical Technology Supervisor, he is coordinating the governance of medical technology; from the introduction and use, to removal of the technology in a clinical setting. He is an accredited Medical Technology Expert for the national Central Committee on Research Involving Human Subjects (CCMO).