Associate Scientist, Fermentation (South San Francisco, CA)

Sutro Biopharma, Inc. is looking for energetic and talented individuals to join its multidisciplinary research and development team. You will be working to develop new processes to maximize our technology and enhance our internal and collaborative product development initiatives in a fast-paced environment.


You will participate in cross-functional teams and collaborate on multiple projects. Responsibilities extend from running established fermentation and cell free extract production processes to developing new processes to increase productivity. Experiments are conducted over a large range of scales using a variety of techniques. Current fermentation equipment includes small-scale multi-unit systems, larger SIP laboratory systems, and medium size pilot and manufacturing scale fermentors. Cell free extract preparation equipment includes small and medium scale homogenizers along with a range of batch and continuous centrifuges. The successful candidate will design and execute fermentation as well as primary recovery processes, develop new processes appropriate to the scale and manufacturing phase for given projects and implement appropriate assays to characterize extracts to better understand the technology and processes. In addition, the successful candidate will be required to make presentations to internal teams and senior management and to author internal and external publications. Weekend and off shift work (when necessary) for development and production work is required.


We are seeking a highly-motivated team-player with excellent problem-solving skills and experience in fermentations and cell lysate preparation and clarification. Versatility is a must, as tasks will involve a range of reactors and scales and process modes. Good organizational skills and the ability to manage tasks within a timeline are essential.

The ideal candidate will have the following background/skill set:

  • Bachelors or Masters in Chemical Engineering or a related discipline, with 5+ years’ industry experience. PhD in Chemical Engineering or a related discipline, with 0-2 years’ industry experience.
  • Experience with the following is required:
    • Laboratory and pilot scale process equipment,
    • Designing and executing E. coli fermentations including fed-batch and/or continuous fermentations, and preparing cell lysates and clarification
  • Experience with the following is preferred:
    • Process validation and technology transfer
    • cGMP Bioprocessing
    • MFCS/Delta/Visual basic programming
    • Design of experiments
    • Working on cross-functional teams
    • Mechanical aptitude 

Sound exciting? Apply today and join our team!

Please submit resume for Req. #2300 to Please visit our website at for more information.

Sutro Biopharma, Inc. requires all new hires to be fully vaccinated for COVID-19 prior to the first date of employment.  As required by applicable law, Sutro will consider requests for reasonable accommodations.

Sutro provides a competitive benefits package that includes a choice of health, dental, and vision insurance, life insurance, flexible spending accounts, 401K plan, PTO, ESPP (Employee Stock Purchase Plan) and stock options.

As an equal opportunity employer, we believe in fostering a culture that is inclusive and values diversity in background and opinions. Sutro Biopharma hires extraordinary individuals into every position in the company and is committed to the diversity of our team. Our company progresses without regard of race, ethnicity, gender, sexual orientation, religious belief, age, disability or citizenship status. We are dedicated to creating a safe environment where our employees can grow and succeed together.

Salaries listed on jobsites may not be representative of salary ranges at Sutro Biopharma.

Please be advised, inquiries or resumes from recruiters will not be accepted.

Company Overview

Sutro Biopharma, Inc., located in South San Francisco, is a clinical-stage drug discovery, development and manufacturing company. Using precise protein engineering and rational design, Sutro is advancing next-generation oncology therapeutics.

Sutro is dedicated to transforming the lives of cancer patients by creating medicines with improved therapeutic profiles for areas of unmet need. To date, Sutro’s platform has led to cytokine-based immuno-oncology therapies, ADCs, vaccines and bispecific antibodies directed at precedented targets in clinical indications where the current standard of care is suboptimal.

The platform allows it to accelerate discovery and development of potential first-in-class and best-in-class molecules through rapid and systematic evaluation of protein structure-activity relationships to create optimized homogeneous product candidates.

In addition to developing its own oncology pipeline, Sutro is collaborating with select pharmaceutical and biotech companies to discover and develop novel, next-generation therapeutics. As the pace of clinical development accelerates, Sutro and its partners are developing therapeutics designed to more efficiently kill tumors without harming healthy cells.