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Validation Scientist

United States, San Jose Employment contract 45.00 - 50.00 USD / Hour · Job Posted January 11, 2026
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Job Responsibility

  • Maintaining the health, expansion, and inventory of cell lines
  • Performing cryopreservation and thawing of mammalian cells
  • Purification of leukocytes from mammalian-derived samples (i.e., venous blood) via different density-gradient centrifugation methods and RBC lysis protocols
  • Staining of cells in tubes and plates for intracellular and extracellular antigens
  • Fixation and permeabilization of cells, treatment of cells in culture with various agents, maintaining documents/lot numbers of antibodies and reagents
  • Counting cells via hemocytometer and/or proprietary cell counters
  • Preparing buffers, media, and other reagents
  • Maintaining inventory of critical laboratory supplies (consumables and reagents) in the lab
  • Attend meetings, as needed

Requirements

  • At least 2 years of experience working in a Biosafety Level 2 laboratory environment, performing cell culture with multiple different mammalian cell lines
  • Best practice experience doing antibody methods for antigen labeling (e.g., flow cytometry, western blots, ELISA, ELISPOT)
  • Experience working with primary cells derived from various mammalian species
  • Proficient with phase-contrast and brightfield microscopy
  • Excellent aseptic technique
  • Ability to troubleshoot common technical problems associated with cell sample preparation for flow cytometric studies
  • Ability to calculate basic laboratory calculations
  • Excellent attention to detail, can work quickly and accurately, organizing tasks and delivering quality with efficiency
  • Ability to read and understand Standard Operating Procedures
  • Ability to interact with researchers for delivery of cells
  • Ability to maintain a clean work area
  • Knowledge of GLP/GDP guidelines
  • Experience working in a lab, with basic lab skills and knowledge (pipetting, dilutions, titrations, etc.)
  • Excellent written and oral communication skills
  • A minimum of a bachelor’s degree in Microbiology, Biology, Biochemistry, Immunology, or a related field

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