Associate Scientist, Vaccines Upstream Bioprocess Development

Pfizer’s purpose is to deliver breakthroughs that change patients’ lives. At the core of fulfilling this purpose is Research and Development, where we strive to translate advanced science and technologies into the therapies and vaccines that matter most. Your role will focus on developing robust, scalable, and high-productivity cell culture processes for manufacturing biological therapeutics for both early- and late-phase clinical programs. Your extensive experience and deep understanding of the principles, concepts, and practices of the discipline will make you an invaluable team member. Your expertise will guide critical decision-making processes, often requiring you to choose among limited options. You will actively contribute to all team discussions, bringing your innovative scientific mindset to the table. This proactive approach will help Pfizer achieve new milestones and make a significant impact on patients worldwide.

In this role, you will:

• →Support the design, development, and optimization of microbial fermentation processes for vaccine antigen production
• →Assist with screening and evaluation of microbial strain candidates using high-throughput fermentation systems
• →Operate fermentation systems up to 75 L scale, including media preparation, fermenter setup, process monitoring and control, and product harvest
• →Perform fermentation sample analysis using high-performance liquid chromatography, bioanalyzers, and other analytical instruments
• →Evaluate and implement new technologies that enhance fermentation process development capabilities within the group
• →Analyze fermentation data and prepare clear summaries for supervisors and cross-functional project teams
• →Document experiments in electronic laboratory notebooks in a timely, accurate, and compliant manner
• →Provide occasional support for mammalian cell culture activities, including bioreactor setup, process monitoring, sampling, and data analysis, as program needs require
• →Flexible work schedule required to support time-sensitive fermentation and cell culture experiments, including occasional work outside of core business hours and on weekends

This role has no special physical requirements beyond those typically associated with laboratory work, including the ability to occasionally lift 20–30 lb items, perform aseptic transfers, and carry out relevant laboratory functions. Mental requirements include a detailed understanding of the scientific subject matter, the ability to apply sound scientific judgment, and the ability to perform complex data analysis.

This role requires flexibility in work schedule to support time-sensitive fermentation and cell culture experiments. Occasional work outside of core business hours, including weekends, may be required based on experimental timelines and program needs.

Work Location Assignment: On Premise

Relocation assistance may be available based on business needs and/or eligibility.

Candidates must be authorized to be employed in the U.S. by any employer.

U.S. work visa sponsorship (such as TN, O-1, H-1B, etc.) is not available for this role now or in the future.

To learn more about acceptable and prohibited uses of AI during the recruitment process, please review our candidate AI-use guidelines available on Pfizer Careers.