Senior scientist

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Job Description

For our department in Leiden we are looking for an enthusiastic


Senior Scientist Molecular Bioassay group


Location: Leiden

Hours: 32-40


Introduction of company and team:

Janssen Vaccines & Prevention B.V., 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.

The Molecular Bioassay (MBA) group is part of the Analytical Development (AD) group and is responsible for developing molecular and bioassay methods that are employed to analyze virus based vaccines that are mainly produced with the PER.C6® technology. Product analysis includes tests for quantity, potency, purity, and identity, but also detailed structural characterization of vaccines. The AD group has a pivotal role between the regulatory authorities, quality unit and process development.

Within MBA, you will be working in a varied team with 30 members from assistant scientists to senior scientists with a meaningful role to guide the team in late stage method validations and specification setting strategy.

Responsibilities and Duties:

We are looking for a senior scientist who enjoys mentoring of a multidisciplinary team. Focus will be the life cycle management up to and including validation of molecular and bioassays for release and characterization of our vaccines.

These methods include formats, such as ELISA, (q)PCR, cell culture-based assays and NGS. The senior scientist acts as technical lead to strengthen our late stage product development strategy. You influence internal collaboration for multi-year projects across multiple disciplines. You may act as senior author in the preparation of presentations, documents for regulatory filing and patents.

Importantly, you will work together with scientists in the team and bring their late stage knowledge to the next level. 


A suitable candidate will have a Ph.D. degree (or equivalent) with minimum 6 years of pharmaceutical industry experience in a relevant field of cell-based assays, molecular biology and/or cell biology and is familiar with techniques as ELISA, qPCR, cell culture, virus culture. You will have ICH method development and GMP experience. Preferably, you have commercial product development experience.

The candidate has a flexible work attitude and a can-do mentality. You are a teammate that is eager to extend their knowledge of new technologies. Strong communication skills and ability to work effectively with investigational site staff, team members and functional manager. Finally, you have a critical attitude and value accuracy in the execution of your work and that of others.

Our company offers a broad range of benefits and a competitive salary, as well as flexible hours and home office possibilities.

Primary Location
Netherlands-South Holland-Leiden-
Janssen Vaccines & Prevention BV (8852)
Job Function
Requisition ID