Senior Associate Scientist

Use Your Power for Purpose At Pfizer, our purpose is to deliver breakthroughs that change patients’ lives. As a Senior Associate Scientist, you will be at the forefront of this mission, working within our Research & Development division. Your role will be pivotal in translating advanced science and technologies into therapies and vaccines that matter most. By leveraging cutting-edge design and process development capabilities, you will help accelerate the delivery of best-in-class medicines to patients globally, ultimately improving their lives. ROLE SUMMARY The qualified candidate will join the Analytical R&D organization to enable development of biological therapeutics and vaccines in Chesterfield, MO. They will be responsible for applying analytical methods in the assessment of product quality, detection of impurities, and characterization. This group performs testing in the R&D and/or regulated settings in support of clinical drug and vaccine candidates. The group performs method development, transfer, verification, and qualification in support of process and formulation development for biotherapeutics and vaccines. ROLE RESPONSIBILITIES The qualified colleague is responsible for: • Developing, troubleshooting, and utilizing analytical methodologies to support process development of biotherapeutics, vaccines and oligonucleotides. • Becoming proficient in a breadth of analytical methodologies including HPLC, colorimetric, and electrophoresis assays. The colleague must work within corporate guidelines and must appropriately record, archive, and report all data. They must also be able to interact effectively with peers and leaders as part of a multi-disciplinary team. The candidate must thrive in a fast-paced environment. Attention to detail, strong organizational skills, the ability to multitask and effective interpersonal and communication skills are required. Documentation of analytical results in technical reports is required. QUALIFICATIONS MINIMUM: • Bachelor’s degree in Chemistry, Biochemistry, Biology, or a related field, with 3+ years of relevant experience; or • Master’s degree in Chemistry, Biochemistry, Biology, or a related field, with 0–2 years of relevant experience. • Laboratory experience in a variety of analytical laboratory techniques. • Ability to follow established procedures under minimal supervision. DESIRABLE: • Experience with Quality Systems and Good Documentation Practices. • Some knowledge of drug development process for progression of biological candidates. • Experience using common AI tools, including generative technologies such as ChatGPT or Microsoft Copilot, to support problem solving and enhance productivity. • Demonstrated curiosity for exploring how these tools can improve outcomes and understanding of responsible AI practices, including risk management and ethical use. OTHER ATTRIBUTES DESIRABLE: • Excellent documentation skills • Self-motivated and highly effective in a team-based environment • Effective oral and written communication skills • Experience in analysis of large molecules • Experience with laboratory data systems such as Laboratory Information Management Systems PHYSICAL/MENTAL REQUIREMENTS Position requires occasional light lifting and periods of standing, sitting or walking. NON-STANDARD WORK SCHEDULE, TRAVEL OR ENVIRONMENT REQUIREMENTS None Work Location Assignment: On Premise     The annual base salary for this position ranges from $68,600.00 to $114,300.00. In addition, this position is eligible for participation in Pfizer’s Global Performance Plan with a bonus target of 7.5% of the base salary. We offer comprehensive and generous benefits and programs to help our colleagues lead healthy lives and to support each of life’s moments. Benefits of