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Scientist II Associate CA Only

Spectraforce Technologies
United States, California, South San Francisco
Jun 20, 2025
Position Title: Scientist - II (Associate)
Work Location: South San Francisco, CA 94080
Assignment Duration: 12 months
Work Arrangement: Onsite
Position Summary:


  • We are looking for a motivated scientist to be an integral part of the Protein Science department within Discovery Biologics at our organization.
  • The successful candidate will be involved in multiple aspects of the production of recombinant proteins, monoclonal antibodies, multispecific scaffolds, and novel protein modalities to enable all aspects of Early Discovery.
  • Ideally, the candidate will be able to execute and develop on techniques involving recombinant protein expression in CHO cells using both transient and stable-pool techniques.
  • Additionally, the candidate should have foundational experience in purification and QC, along with a proven ability to accurately record and present data.


Background & Context:



  • We are Discovery Biologics, and we are on a quest for cures and are committed to be the world's premier, most research-intensive biopharmaceutical company.
  • We identify and target steps in disease mechanisms or pathways that could be inhibited or enhanced.
  • Our goal is to isolate a compound that is effective against a disease target.
  • Using innovative thinking, state-of-the-art facilities and robust scientific methodology we collaborate to discover the next medical breakthrough.
  • Our teams combine leading drug discovery capabilities and world-class R&D with the purpose of turning breakthrough science into life-changing medicines.


Key Responsibilities:



  • Maintain and propagate CHO cells in suspension culture independently to support ongoing projects in a cell culture lab.
  • Perform transient and stable transfections for protein expression in mammalian cells (CHO, HEK293).
  • Express and batch purify a variety of proteins (monoclonal, bispecific antibodies, VHHs, Fabs, Fc-Fusions, etc.) using both resin and magnetic-bead immunoprecipitation methods.
  • Execute fed-batch experiments in a variety of platforms: shake flasks 125ml to 5L, tube spins and multi-well plates.
  • Perform analytical measurements for cell growth, metabolite measurements and HPLC analysis of titers from supernatant.
  • Analyze purified proteins using techniques: SDS-PAGE, HPLC, UPLC, CESDS, Nano-drop, UV-Vis.
  • Maintain and troubleshoot mammalian cell culture systems.
  • Document protein production processes, prepare reports and communicate results.
  • ELN documentation.


Qualification & Experience:



  • B.S. degree in Biochemistry, Cell/Molecular Biology, Bioprocess engineering or related fields and three (3) years of industry or academia experience or a M.S. degree with 1 year of experience in similar fields.
  • Prior experience in mammalian cell culture techniques, and cell culture media preparation is a prerequisite: single use mammalian cell culture tools employed in bioprocess development, including but not limited to deep well plates and shake flasks.
  • Perform transient and stable transfections for protein expression in mammalian cells (CHO, HEK293).
  • Ability to multi-task different protocols at once, handle concurrent projects simultaneously with high attention to detail.
  • Excellent aseptic techniques and familiarity with principles of sterilization/disinfection.
  • Strong communication, organizational, and interpersonal skills.
  • Able to maintain a "can-do" attitude and act with a sense of urgency to complete innovative projects while being flexible in work priorities based on business needs.
  • Understand and adhere to corporate standards regarding code of conduct, safety, appropriate handling of materials.
  • Able to troubleshoot cell culture system and think critically about experiments.
  • Must be comfortable with physical activities of constant standing, walking, and sitting with arm stretching into biosafety cabinets for cell culture work.
  • Basic knowledge on biological data collection and analysis tools (Vicell, metabolite analyzers) and computer applications such as ELN, MS Word, MS Excel and MS PowerPoint.
  • Experience with high-throughput systems and automation.
  • Experience with batch purification using a variety of scaffolds and basic QC.
  • Industry experience is preferred.
  • Experience with data and reagent management software such as Dotmatics, Benchling, Spotfire, etc is preferred.

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