Senior Research Associate, Upstream Process Development (South San Francisco, CA)

Sutro Biopharma, Inc. is looking for a talented Senior Research Associate to join our Upstream Process Development team. You will be working to develop and scale up pharmaceutical protein production processes to internal and external manufacturing sites.


The candidate hired for this position will join a productive and professional upstream process development team and are expected to:

  • Participate in cross-functional teams and collaborate on multiple projects to support development of Sutro’s novel cell-free protein synthesis process (XpressCF™).
  • Design and conduct experiments over a wide range of scales (screening ~mL through large ~kL scale) to optimize upstream process conditions for product candidates in various stages of development through GMP manufacturing.
  • Prepare reagents, buffers, and other materials used in cell-free protein synthesis reactions.
  • Maintain clear and accurate lab notebooks and author technical reports.
  • Regularly present work and findings during group meetings.


We are seeking a highly motivated team-player with excellent problem-solving skills and good understanding of bioprocesses. Versatility is a must, as tasks will involve a range of reactors and scales and process modes. The ideal candidate will have the following background/skill set:

  • BS/MS in Biochemistry, Bioengineering, Chemical Engineering, or other relevant disciplines with 3-5 years of related industry experience.
  • Understanding of laboratory scale process equipment, especially bioreactors for microbial and/or mammalian culture.
  • Understanding of bioprocess development (cell-free, microbial, and/or mammalian cell-based) and cGMP bioprocessing.
  • Strong organization skills in experiment recording and data summary with strong attention to details.
  • Ability to communicate and work collaboratively in a team environment.
  • Effective and strong problem-solving capabilities is a must.

Sound exciting? Apply today and join our team!

Please submit resume for Req. #2225 to Please visit our website at for more information.

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.