Koos van der Hoeven has completed his studies in Biology  at the Wageningen University (WUR) and later in Medicine at Free University Medical Centre in Amsterdam. He was trained medical oncologist at the University Medical Center and the Netherlands Cancer Institute. He has worked as a medical oncologist at several hospitals. From 2012 till 2015 he was professor and head of the department of Medical Oncology for Leiden University Medical Center. From 2015 till 2019 he had the same position at the Radboud University Medical Center in Nijmegen.  He was medical director for Hartwig Medical Foundation tfrom 2020 till July 2023. He is  member of the supervisory board Dutch Institute of Clinical Auditing (DICA) and member of the advisory board “Innovative Medicines Association”. He is chairman of the regional cancer network Oncomid. This is a regional oncology partnership in which nine hospitals in the central Netherlands join forces. They provide diagnostics and treatment according to the latest insights, share knowledge and experience, and conduct scientific research to improve and innovate care.