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Senior Scientist Molecular & Bioassays

  • Location:

    Leiden, Netherlands

  • Contact:

    Nicol Heijtbrink

  • Job type:

    Temp to Perm

  • Contact phone:

    +31 (0)20 406 9750

  • Industry:

    Biotechnology, Pharmaceutical

  • Contact email:

We are currently looking for an experienced Senior Scientist with a background in Assay Development / Virology, who can act as coach to a team of dedicated scientists.

Job Description

The Molecular Bioassay group at Janssen Vaccines & Prevention 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 testing for quantity, potency, purity, and identity, but also detailed structural characterization of vaccines. The group has a pivotal role between the regulatory authorities, quality unit and process development.
Within the department, you will be working in a varied team with 30 members from assistant scientists to senior scientists with a meaningful and crucial role to guide the team (mostly a group of 7 scientists) in late stage method validations and specification setting strategy.


  • Mentoring of a multidisciplinary team; work together with scientists in the team and bring their late stage knowledge to the next level;
  • Focus will be the life cycle management up to and including validation of molecular and bioassays for release and characterization of our vaccines. Formats used are ELISA, (q)PCR, cell culture-based assays and NGS;
  • Act as technical lead to strengthen our late stage product development strategy;
  • Influence internal collaboration for multi-year projects across multiple disciplines;
  • Act as senior author in the preparation of presentations, documents for regulatory filing and patents;


  • Ph.D. degree (or equivalent) in life sciences, biotech, molecular biology, etc.
  • Minimum 6 years of pharmaceutical industry (GMP) is a must;
  • Experience in a relevant field of cell-based assays, molecular biology and/or cell biolog;
  • Familiar with techniques as ELISA, qPCR, cell culture, virus culture ICH method development;
  • Preferably commercial product development experience;
  • Flexible work attitude and a can-do mentality;
  • Strong communication skills and ability to work effectively with investigational site staff, team members and functional manager;
  • Critical attitude and value accuracy;
  • VAlid dutch work permit is a must;
  • Contract: Initially 6 months via Oxford, after this period the aim is to offer a permanent position directly 
  • Salary: €4700- €6000 gross monthly based on a full-time position
  • Holidays: 25+12
  • Working hours: full-time, 32 hours discussable
  • Region: Leiden