Assistant Scientist Bacterial USP

bacteria biosafety BSL bioreactor GMO


CLS Services is a leading professional recruitment agency specialised in chemistry & life sciences.
For our client Janssen Vaccines & Prevention we are searching for an Assistant Scientist Bacterial USP.

  • B.Sc. microbiology, biochemistry and bioengineering
  • Bacterial culture
  • Biosafety level 1 and 2
  • Bioreactors

For Bacterial Vaccines department we are currently seeking a full-time Assistant Scientist – Early-stage Bacterial Upstream Processes to join the Bacterial Upstream Processes (USP) team as a bioreactor operation specialist. You will support the Bacterial Vaccines project teams by applying your understanding of professional practices of bioprocess development for vaccine candidate manufacturing. In this role, you are responsible for the preparation and operation of a range of biopharmaceutical USP units fit for bacterial culture and harvest, including shaker flasks and bioreactors. Experimental work will also include sample preparation, analysis, sample management and data processing. Cross-functional communication with internal and external stake holders and support is pivotal part for the job function.

Your main responsibilities will be:
  • Experimental preparation: Bioreactor build-up, media preparation, stock and inventory management;
  • Experiment execution and process development: Seed trains, bioreactors, harvest, sample management, in process controls, etc.;
  • Experimental reporting to stake holders: Electronic laboratory notebook (ELN) and experimental reports;
  • Support the USP technology transfer to internal and external late development partners.


Do you have a Bachelor in a relevant discipline such as microbiology, biochemistry and bioengineering? And more then one year of experience in Life Sciences industry? Experience with Bacterial culture activities at biosafety level 1 and 2, incl. genetically modified organisms (GMOs)? And do you have experience with operating of bioreactors and proficiency handling related software? Then apply right now!


Salary: >2800
Days of leave: 36
See here our other employment terms for this vacancy

Company profile

Janssen Vaccines & Prevention B.V. is part of Johnson & Johnson, one of the biggest and most respected health care companies in the world. They are dedicated to bringing meaningful innovation to global health. Their teams focus on the discovery, development, manufacturing, and marketing of novel vaccines to prevent some of the most devastating and complex infectious diseases. These range from respiratory infections like respiratory syncytial virus (RSV) to human immunodeficiency virus (HIV) and pathogens of global concern, such as Ebola and COVID-19.
In this organisation, entrepreneurial people are working in a dynamic culture in which innovation and a 'can do' state of mind are of crucial importance. They are continuously looking for enthusiastic, talented people who have the ambition to develop themselves and can be of value to Janssen. The offices of Janssen Vaccines & Prevention are located in Leiden, The Netherlands.

The Bacterial Vaccines department is working on the discovery- and early development of novel vaccines for bacterial infectious diseases. It strives to address unmet medical needs, such as bacteremia (sepsis) and nosocomial infections. Projects at the Bacterial Vaccines department are primarily structured on scientific- and technical collaboration with external biotechnology partners (governmental and industrial) that are innovative leaders in their field. This working process includes ‘state of the art’ vaccine discovery, with subsequent in vivo evaluation of these vaccine candidates in animal models for immunogenicity and/or efficacy. In addition, manufacturing processes are optimised and established, and the resulting clinical trial material is evaluated in human clinical studies.


Interested? Send us (CLS Services) a detailed curriculum vitae, accompanied by an application letter indicating your motivation. Please use our online application form.
Location Leiden
Assistant Scientist Bacterial USP

Create a job alert

Would you like to receive the latest vacancies in your e-mail box? Create a job alert based on your keyword(s) and preferences.

Sign up

Search jobs

Find your next job in Life Sciences via BCFcareer. Click on search jobs to find the vacancies that fit you. 

Learn & grow

Find the training programmes and courses that help you grow in your career.

Find employers

Find your next employer by exploring the company profiles of employers in Life Sciences.

Expand your network

Grow your network with the online and live networking opportunities of BCFcareer.

Post your CV for recruiters

Hyphen Projects uses cookies to remember certain preferences and align interests.
By continuing to use this site, you consent to our use of cookies.