Associate Scientist

Location: Leiden, South Holland Salary: competitive
Sector: Life Sciences, Upstream Type: contract

Job title: Associate scientist USP


Janssen Vaccines & Prevention, one of the Janssen Pharmaceutical Companies of Johnson & Johnson, is dedicated to bringing meaningful innovations to global health. We focus on the discovery, development, manufacturing and marketing of vaccines and antibodies to protect people from infectious diseases. We have built a dedicated, world-class, multi-functional team across a variety of disciplines to develop a promising vaccines pipeline. We partner with many of the world's leading experts, academic and clinical institutions and other pharmaceutical companies for the development of vaccines against, for example, Ebola and HIV.

The USP department is responsible for the development of scalable, pharmaceutical-grade production processes for viral vaccines using mammalian cell lines as a production platform. Novel technologies are used to make sure that the processes are safe, reliable, scalable and cost-effective, so that the vaccines can be produced in large quantities at low costs. The developed production processes are transferred into GMP production facilities for the production of clinical batches and scaled-up for commercial production. All activities are performed in close collaboration with other departments. Within the department, a lab team is responsible for performing all hands-on experimental activities, data processing and documentation, whereas a team of scientists is responsible for the overall scientific approach and progress within our projects.


Janssen Vaccines & Prevention is looking for a motivated Associated Scientist within the field of upstream process development. Under limited supervision, but as part of a team you will plan, prepare and execute scientific studies. This will be part of a project plan, and you will be responsible for analyzing the results and reporting main conclusions. Experiments may be performed in bioreactors or in a reduced-scale model. You are a team player with excellent communication skills.


  • You have an M.Sc./PDeng in a relevant discipline, or a B.Sc with 3 years of experience in biotechnology or pharmacy.
  • You have a strong affinity with upstream process development, as demonstrated by experience with mammalian cell culture, hands-on experience with bioreactors, preferably at different scales / sizes.
  • Experience with production, technology transfer and knowledge of GMP is an advantage.

If this position is something that you want to do, and if you believe you have the right qualifications and experience required for the role, please do not hesitate and send us an e-mail with your most recent CV and short motivation letter to: j.vanbaalen(@)