J&J Family of Companies Assistant Scientist (Technician) cGMP in Leiden, Netherlands

Janssen Vaccines & Prevention, previously Crucell, one of the Janssen Pharmaceutical Companies of Johnson & Johnson, is dedicated to bringing meaningful innovation to global health. Our teams focus on the discovery, development, manufacture and marketing of vaccines and antibodies to protect people worldwide from infectious diseases.

In our organization entrepreneurial people are working in a dynamic culture in which innovation and a 'can do' state of mind are the central points. In order to strengthen our team we are continuously looking for enthusiastic, talented people who have the ambition to develop themselves and can be of value to Janssen.


The department Drug Substance Operations (DSO) is an international team of about 35 people are working on manufacturing of clinical batches to support the development of new vaccines. Execution of the manufacturing process is done in close collaboration with the development department, as well as EVM, QCD, QA, warehouse, etc. Within DSO, we are looking for a cell culture expert.

Job Description:

As an Assistant Scientist, you will be responsible for:

  • Taking part on all activities related to the production of cGMP clinical batches of Biopharmaceuticals produced on mammalian cell lines. This includes processes such as cell and virus culture, purification processes, formulation & fill and in-process testing.

  • Working precisely and meticulously and to detect and communicate possible abnormalities.

  • Accurately completion of documentation such as batch records, logbooks, etc.

  • Actively participating in setting up documentation to ensure successful production runs.

  • Coming up with ideas for continuous improvement that progresses your work for quality, EHS and efficiency perspective. Implement by making use of cross functional teams.

  • Process Excellence activities to continuously improve the work as well as personal skills.

  • Involvement in deviation investigation and follow up


  • BSc (or equivalent) with several years’ experience in a biotechnology or biopharmaceutical industry environment

  • Experienced in cell culture, virus propagation

  • Experienced in working with bioreactors

  • Experience with cGMP environment is required

  • Certified Lean Yellow Belt, preferably Green Belt


  • Precise and careful

  • Team player

  • “Can do” attitude

  • Proven process excellence experience

  • Good communication in English (and Dutch), written and spoken

What’s in it for you…?

“Caring for the world, one person at a time…”

As an employee we consider you as our most valuable asset. We take your career seriously.

As part of a global team in an innovative environment your development is key and our day-to-day responsibility.

Through e-university, on the job training, various projects and programs, we ensure your personal growth.

Our benefits make sure we care for you and your family now and in the future.

Primary Location

Netherlands-South Holland-Leiden


Janssen Vaccines & Prevention BV (8852)

Job Function


Requisition ID