Willem Mostert

Senior Consultant


Willem studied aircraft technology at the HTS in Haarlem. He started working at several companies who design and manufacture process equipment in the role as business unit manager and technical manager.

Starting in 2005, Willem worked as an engineering project manager for upstream and downstream processes at Janssen Biologics (Centocor at that time). In this role he was involved with the Tech Transfer of a new cell line, where he introduced CO2 incubators up till TFF skids (downstream process). He continued his career as manager validation department at Janssen Biologics, responsible for 19 FTE. In this role he initiated several lean six sigma improvement projects. Three years later he became manager validation and calibration and participated in several OPEX projects at Teva Haarlem.


Willem is married and in his free time he enjoys many activities: sailing, cycling, fitness, snowboarding, motor tours, rowing in a whaler sea boat, all accompanied by a wide variety of music. He studied sciences at the Open University and  volunteers at the Science Cafe Leiden by organizing lectures from professors.


  • Engineering / Maintenance manager
  • Project and program management
  • Interim management
  • Design of utility systems (WFI, PW, Clean Steam and HVAC)
  • OPEX, LSS and improvement projects