Senior Associate Scientist

St. Louis

Thursday, 04 June 2026

In this role, you will:Conduct qualitative and quantitative analyses of various compounds and biologics to determine their properties during chemical syntheses, fermentation, or drug product development. Perform analytical method lifecycle activities such as development, validation, and transfer activities for both small molecules and complex formulations. Maintain written records of all experimental work in compliance with GLP/ GMP and departmental SOPs. Assist in the maintenance and renewal of laboratory instruments, systems, or apparatus, and improve safe and effective working practices. Attend project team and brainstorming meetings to present data and apply technical skills to assignments. Work under moderate supervision with regular review and identify activities to support work group/project team goals. Contribute to the achievement of immediate work group goals and collaborate with other team members. Prioritize work to meet project deadlines and ensure participation and contribution as a team member. Continuously improve safe and effective working practices in the laboratory environment. Responsible for performing and troubleshooting analytical assays, while applying these methods across a board range of early and late-stage products in a cGMP environment. Qualifications. Must Have. BA/ BS with 3 to 5 years of experience performing biotherapeutics testing in a GMP environment. Master's Degree with 4 to 6 years of experience performing biotherapeutics testing in a GMP environment. Strong documentation skills and attention to detail. Experience with method validation. Ability to extract relevant information from scientific literature. Proficiency in recording observations, facts, data, and conclusions during experimental work or cGMP investigations. Solid understanding of fundamental analytical chemistry, including functional group recognition and compound characterization. Experience using spectroscopic and chromatographic techniques. Experience in GMP laboratory operations and logistics. Effective interaction with peers and leaders as part of a multi-disciplinary team. Strong verbal and written communication skills. Nice to Have. Understanding of various scientific software or software used in pharmaceutical or production environments. Good Laboratory Practices (part of Gx. P) and Good Manufacturing Practices (also cGMP) knowledge. Problem-solving skills and the ability to make decisions based on limited options. Initiative and proactive approach to tasks and projects. Experience using common AI tools, including generative technologies such as Chat. GPT 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 PHYSICAL/ MENTAL REQUIREMENTS - Position requires occasional light lifting and periods of standing, sitting, or walking. NON-STANDARD WORK SCHEDULE, TRAVEL OR ENVIRONMENT REQUIREMENTS Position requires occasional off shift (evenings). 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 offered include a 401(k) plan with Pfizer Matching Contributions and an additional Pfizer Retirement Savings Contribution, paid vacation, holiday and personal days, paid caregiver/parental and medical leave, and health benefits to include medical, prescription drug, dental and vision coverage. Learn more at Pfizer Candidate Site – U.S. Benefits | (uscandidates.mypfizerbenefits.com). Pfizer compensation structures and benefit packages are aligned based on the location of hire. The United States salary range provided does not apply to Tampa, FL or any location outside of the United States. 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-1 B, etc.) is not available for this role now or in the future.

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