Margreet Rienstra (1969) joined the operational team of CHDR in 1998 following a nursing career during which she worked as a registered general nurse (1992) and an ICU nurse (1997). In 2001, she completed the post-vocational education programme for Clinical Research Coordinators in Rotterdam. From 2004 to 2006, she worked as Clinical Research Coordinator at the Erasmus Medical Center in Rotterdam and Leiden University Medical Center. In 2006, Margreet returned to CHDR to take up the position of Quality Assurance Manager, becoming head of the QA team. Since then, she has been involved in all audits and inspections performed at CHDR and has been responsible for CHDR’s quality management system. In 2019, she was appointed Compliance Director and joined CHDR’s Management Team.