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    Sr. Lab Technician

    Vacancy number: A-2-2600072
    Johnson & Johnson Innovative Medicine - Leiden (Nederland)

    For our client, Johnson & Johnson Innovative Medicine, we are looking for a Sr. Lab Technician.

    Keywords

    • UPLC, HPLC
    • Cell Culture
    • GMP Compliance
    • ELISA, PCR
    • Assay Qualification

    Profile

    Within the Strategic Operations (SO) group of the Analytical Development Department at Johnson & Johnson Innovative Medicine in Leiden, we are looking for a motivated Senior Lab Technician. You will work in a multidisciplinary environment and contribute to GMP-compliant testing and assay qualification activities for Advanced Therapeutics products.

    Your key responsibilities include release and stability testing of GMP/TOX and clinical batches, execution of assay qualifications in GMP-qualified laboratories, and performing routine assays with a first-time-right attitude. You work with analytical methods such as UPLC and HPLC, maintain accurate documentation including digital assay run sheets and laboratory notebooks, and support Process Development testing.
    • Culturing of cells, including passaging and seeding;
    • Writing and updating test instructions and work instructions;
    • Contributing to environmental and utility monitoring programs within production clean rooms.

    Who we're looking for

    You hold an MBO or HBO degree in a life science discipline and have 2-3 years of experience in a GMP pharmaceutical environment. You are hands-on, accurate, and bring a positive can-do mentality to your work.
    • Demonstrated experience with analytical methods (UPLC, HPLC) and laboratory management systems;
    • Preferably, also experience with ELISA, PCR and cell culture, but can also be learned;
    • Experience with assay qualifications and/or validations is a strong advantage;
    • Good communication skills in English, both written and verbal;
    • Flexible, quality-focused, and capable of building strong working relationships in a multidisciplinary team.

    Department

    The Strategic Operations group is part of the Analytical Development Department within the Advanced Therapeutics sector. The team supports production and laboratory activities through release and change management of raw materials, environmental monitoring, stability testing co-ordination, and process analytical support for Product Development teams.

    Company profile

    Janssen Vaccines & Prevention B.V. is part of Johnson & Johnson, one of the world's largest and most respected healthcare companies. The organisation is dedicated to bringing meaningful innovation to global health, with a focus on the discovery, development, manufacturing and marketing of novel vaccines against some of the most complex infectious diseases — ranging from RSV and HIV to Ebola and COVID-19. Entrepreneurial professionals work here in a dynamic culture where innovation and a can-do mindset are central. The offices are located in Leiden, The Netherlands.

    Additional vacancy information

    Reference:A-2-2600072
    Contract:Projectmatig dienstverband
    Education:BSc.
    Arbeidsvoorwaarden :

    Project for 1 year.

    Publication date:26-10-2026
    Location:View location with Google Maps
    Contactperson:Claudia Erwich-Faaij
    +31 (0)88 22 77 555

    CLS Services is a leading professional recruitment agency, specialised in the recruitment and career coaching of people with a background in chemistry & life sciences.