Willem Klaassen

Willem Klaassen is an accomplished professional in clinical development with extensive experience in leadership roles across multiple pharmaceutical companies. Currently, Willem serves as the Director of Clinical Development at Byondis since May 2023. Prior to this position, Willem was the Director of Clinical Projects at Xenikos B.V., where responsibilities included the clinical development of T-Guard for steroid-refractory acute Graft-versus-Host Disease. At Acerta Pharma B.V., Willem held the title of Head of Clinical Operations and played a key role in establishing a robust Clinical Operations group and leading a significant global study, ACE-LY-004, for Acalabrutinib. Additional previous roles include Associate Director of Clinical Operations at Merck and various project management positions at Schering-Plough Research Institute and Organon. Willem holds an MSc in Medical Biology from Radboud University and has obtained a Project Management Professional certification from the Project Management Institute, alongside extensive training in management and personal effectiveness.