Scientist (CHO cell line)

  • South San Francisco, California
  • Full Time

Pay: $55/hr. - $65/hr.

Job Description:

  • Perform CHO cell line development, including transfection, selection, single cell subcloning, growth and productivity screening, cell banking and stability assessment of cell banks.
  • Design and generate DNA vector constructs for protein?including monoclonal antibodies and antibody-like molecules)
  • Culture mammalian cells across multiple scales and formats, from 96-well plates up to shake flasks.
  • Operate instruments like ViCell automated cell counter, Octet, Clone Select Imager, microscope, HPLC, ambr15, Beacon and flow cytometer. Share responsibility for equipment maintenance.
  • Perform genetic characterization of cell banks using molecular techniques like DNA sequencing and PCR.
  • Review DNA sequencing data (including NGS), Southern/Northern blots, quantitative PCR results.
  • Author and review cell line development technical reports that meet expectations of regulatory agencies for all stages from IND to BLA.
  • Present updates at cross-functional meetings and collaborate closely with cell culture, purification, analytical and formulation development colleagues to meet project timelines.
  • Actively seek opportunities to optimize or enhance the cell line development workflow.
  • May publish or present scientific findings in peer-reviewed journals, internal or external conferences or consortia.
  • Display effective organization, verbal and written communication skills, and adherence to good documentation practices.
  • Scientist I: BS with a minimum of 5 years or MS with a minimum of 3 years of relevant experience
  • Scientist II: BS with a minimum of 7 years or MS with a minimum of 5 years of relevant experience
  • Proficient in aseptic techniques, mammalian cell culture and basic molecular biology techniques (molecular cloning, plasmid preps, DNA digests/gels, PCR/qPCR)
  • Experienced in developing stably transfected CHO cell lines for production of monoclonal antibodies and antibody-like molecules.
  • Strong understanding of mammalian cell biology and molecular biology concepts.
  • Must have excellent attention to detail and must keep detailed records in electronic lab notebook on a daily basis.
  • Demonstrated ability to independently design, execute and interpret critical experiments to answer scientific questions.
  • Demonstrated ability to learn, understand and master new experimental techniques.
  • Demonstrated ability to work collaboratively within and outside of the group.
  • Demonstrated ability to author technical reports and presentations.
  • Proficient with MS Office software and able to learn new software applications.
  • Able to multi-task and work within timelines.
  • Strong communication skills verbal, written, scientific data presentation.
  • Background in CHO cell line development for GMP applications within biotech/pharma industry.
  • Understanding of cell biology and bioprocess engineering concepts.
  • Hands-on experience running RNA-seq workflow and analysis
  • Experience in bioinformatics software to analyze DNA and RNA for sequence confirmation and expression analysis
  • Proficiency in programming/data science languages, such as R, Python, and Java
  • Experience with flow cytometry
  • Experience with ddPCR
  • Experience with ambr15 operation

The Company offers the following benefits for this position, subject to applicable eligibility requirements:

  • Medical Insurance
  • Dental Insurance
  • Vision Insurance
  • 401(k) Retirement Plan
  • Life Insurance
  • Long-term disability Insurance
  • Short-term Disability Insurance
  • Paid Parking/Public Tansportation
  • Days/Hours of Paid Time off
  • Days/Hours of Paid Sick and Safe Time
  • Days/Hours of Paid Vacation Time
  • Weeks of Paid Parental Leave
  • Paid Holidays annually
Job Requirement
  • CHO
CHO
Job ID: 487751287
Originally Posted on: 8/1/2025

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